Please note: This review reflects information we gathered on the date it was researched and may now be out of date. Providers frequently change their pricing, plans, medications, and policies. Any ratings, reviews, and customer feedback are gathered from publicly available online sources and may have since changed or no longer be accurate. Always do your own research and confirm the latest details directly with the provider before making any decision.
iHerb Review: Its Own Brand Sells a Product Called “GLP-1 Supreme”
iHerb is a real discount supplement retailer, trading since 1996, and the things that genuinely help during rapid weight loss — complete protein, fibre, B12, vitamin D — are cheap there. It has also built a merchandised GLP-1 Formulas category that returned 757 results when we searched it, and four of those products carry its own house label. None of them contain a GLP-1 drug.
We are paid 13% — and this review argues against the profitable purchase
GLP1Drugs.org earns 13% of anything bought through our links here. Worth knowing before you read on, because the recommendation below is to buy a plain tub of whey or pea protein, a basic multivitamin and some fibre — and to walk past the premium capsules with the drug class printed on the front. The premium capsules would pay us more.
Our Verdict
iHerb · iherb.com · supplement retailer, trading since 1996
757 results for a prescription drug class it does not sell
Searching GLP-1 returned 757 results on 12 August 2026, with a dedicated GLP-1 Formulas page offered from the results. Product names include GLP-1 Supreme, Super GLP-1 Support, GLP-1 Complete, GLP-1 PRO, GLP-1 Fusion, GLP-One+, Support GLP-1 Production, and one product named simply GLP-1. Every one is a supplement. The naming works only because prescription medicines made the term familiar.
Four of them are iHerb’s own label
California Gold Nutrition is a house brand — it runs throughout iHerb's own iHerb Brands category page. Under that label we found GLP-1 Supreme with Akkermansia, Berberine, Quercetin and Curcumin; Akkermansia + Probiotics GLP-1 Complex; and a GLP-1 Support Formula in three sizes and flavours. Stocking what other brands make is a merchandising decision. Naming your own capsule GLP-1 Supreme is an authoring decision.
The house GLP-1 protein uses collagen — the wrong protein for muscle
Preserving lean mass is the main nutrition goal on these drugs, so a protein product aimed at GLP-1 users is a good idea. But collagen peptides are an incomplete protein with no tryptophan and very little leucine, the amino acid that drives muscle protein synthesis. Whey, soy and good pea blends are complete and leucine-rich, and iHerb sells all of them more cheaply without the label.
The genuinely useful stuff really is cheap here
This is not a scam operation and we are not telling you to avoid it. A thirty-year-old discount retailer with a huge catalogue is a perfectly sensible place to buy complete protein, fibre, vitamin D, B12, a basic multivitamin and electrolytes — which is most of what actually helps during rapid weight loss. The trick is buying those, not the ones with a drug class on the front.
90-day returns on its own brands, and free domestic return labels
Most products get 30 days; iHerb's own brand products bought on the site or app get 90, which is a longer window than most retailers offer on anything. Requests are answered within 48 hours, you have 14 days to ship, domestic labels are free and refunds land 7 to 10 business days after arrival. Credit where due.
Our Top Recommended Provider: CoreAge Rx
After reviewing dozens of GLP-1 telehealth providers, CoreAge Rx is the one we recommend most. CoreAge Rx is one of our partners — read on for why we recommend them:
Flat-Rate Pricing
Same cost at every dose level — no price jumps as you titrate up.
Verified Pharmacies
US-licensed physicians and NABP-verified 503A compounding pharmacies you can trust.
Everything Included
Medication, supplies, free shipping, and ongoing clinical support — no hidden fees.
Active Community of Members
Ask questions, share progress, and get answers from other patients on the same journey — alongside ongoing clinical support from your care team.
757
Results for “GLP-1”, none of them a GLP-1 drug
4
House-brand products with GLP-1 in the name
90 days
Returns on iHerb-brand products bought on site
1996
Trading since, per its own site
Two supplement retailers, one commercial opportunity
We reviewed Swanson separately and rated it 4.2. Both are long-established discount supplement retailers, both sell berberine, and both had exactly the same chance to build a category around the most talked-about drug class in medicine. They made opposite decisions, which is the clearest evidence that this was a choice rather than something the market forced.
| iHerb | Swanson | |
|---|---|---|
| Trading since | 1996 | 1969 |
| Sells berberine | Yes | Yes |
| Merchandised GLP-1 category | Yes — 757 results, dedicated GLP-1 Formulas page | No — zero mentions of Ozempic sitewide |
| Own label uses the drug name | Yes — four products, incl. “GLP-1 Supreme” | No |
| Its own GLP-1 editorial says | Sells you a formula | Recommends diet and exercise over supplements |
| Return window | 30 days; 90 on own brands bought on site | 100 days full refund; 20% fee over $500 |
| Our rating | 3.1 | 4.2 |
iHerb figures retrieved 12 August 2026 from its own search and category pages. Swanson figures from our own review of that retailer, published earlier. Both retailers sell many thousands of products and neither sells prescription medication. Read the Swanson review.
What to actually put in the basket
Start from the problem rather than the shelf. Losing weight quickly means losing some lean tissue along with fat, and the amount you lose is influenced by how much protein you eat and whether you are doing resistance training. Eating far less food also means taking in fewer micronutrients across the board, not because anything is wrong with you but because the total volume has dropped. And the most common day-to-day complaints on these medicines are gastrointestinal — constipation especially. That is the actual shopping list, and none of it needs a special label.
Protein first, because it does the most. What matters is that the protein is complete and rich in leucine, the amino acid most responsible for switching on muscle protein synthesis. Whey does this very well and is cheap in bulk; a pea and rice blend does it well enough if you avoid dairy; soy is complete too. What does not do it is collagen, which is why we keep flagging collagen-based products aimed at this audience. Collagen is fine for what it is, but it lacks tryptophan entirely and carries little leucine, so as the protein foundation for someone trying to hold on to muscle it is the wrong tool.
Then the unglamorous supporting cast. Fibre, because constipation is so common, though this is one to discuss with a clinician: these drugs slow gastric emptying, and bulk-forming fibre such as psyllium needs to be taken with plenty of fluid. A basic multivitamin to cover the general reduction in intake. Vitamin D and vitamin B12, both of which are commonly low and cheap to correct. Electrolytes if reduced appetite has cut your fluid intake as well as your food. That list costs very little at a discount retailer, and it is genuinely most of what supplementation can do here.
What to leave on the shelf is anything selling you the mechanism you are already getting on prescription. If you are taking semaglutide or tirzepatide, you have a GLP-1 receptor agonist in you; a capsule of berberine and Akkermansia is not adding to that in any comparable way, whatever the name on the bottle implies. And if you are not taking one, these products are not a route to the same result — the honest summary of berberine is a modest effect on blood glucose, not weight loss of the kind these drugs produce.
Two safety points that belong with your prescriber rather than a shopping cart. Delayed gastric emptying can change how oral medicines and supplements are absorbed and when, so if you take anything where timing matters, raise it. And botanical extracts are not inert: berberine inhibits the CYP3A4 enzyme system, which is involved in metabolising a great many prescription drugs, and it is not recommended in pregnancy or while breastfeeding. Supplements in the United States are not reviewed by the FDA for safety or effectiveness before they go on sale, so the checking is yours to do.
What we verified
1. The category, counted
We ran the searches ourselves in a browser on 12 August 2026. The term GLP-1 returned 757 results and the results page carried an invitation to visit our GLP-1 Formulas page, so this is a maintained destination rather than an accident of keyword matching. Searching GLP-1 Formulas returned 510. Among the brands using the term in product names we recorded Force Factor, Codeage, Triquetra Health, Pendulum, Lemme, Youtheory, 21st Century, Vital Nutrients, LifeSeasons, Bio Nutrition, Bariatric Fusion, Vitamatic, Best Naturals, Nature's Craft, Genceutic Naturals and Ageless Foundation Laboratories.
The ingredient pattern underneath the names is consistent: berberine, Akkermansia muciniphila, prebiotic fibre, probiotics, quercetin, curcumin, hops extract, amino acids and collagen. Some of that has genuine research interest — Akkermansia is a legitimate subject of metabolic research and Pendulum's presence reflects that — but interesting early research is a long way from what the branding implies, and none of these ingredients act on the GLP-1 receptor the way the drugs do.
The category also contains a transdermal berberine patch. We have reviewed that format before and rated it poorly, because a patch does not solve the problem of getting a botanical into your bloodstream at a dose anyone has studied, and the products in question rarely publish a dose at all. Seeing it appear inside a GLP-1 category on a mainstream retailer is a reasonable illustration of how loose the category has become.
2. Buying, returning, and what it costs
The mechanics are an ordinary retail flow with no consultation, no subscription requirement and no eligibility criteria beyond being able to receive a parcel: browse, add, pay, wait. There is a rewards programme, which iHerb's own site quantifies as more than $98.2 million in credits rewarded during 2025 across more than 3.9 million orders using rewards, and a standing 20% discount offered for joining the email list. Promotional banners were running throughout our visit.
Returns are set out clearly and compare well. Thirty days on most products bought on iHerb.com or the app, ninety days on iHerb's own brand products bought there, and thirty days on anything bought through Amazon or Walmart regardless of brand. Requests get a response within 48 hours, approval starts a 14-day clock to send the package back, domestic return labels are free while international customers get no prepaid label, and refunds are issued once the goods arrive in original condition, taking 7 to 10 business days to appear and up to 35 days internationally. A ninety-day window on your own products is a real commitment and we will say so.
Prices are the gap in this review and we would rather be blunt about it than paper over it. Our connection was geolocated to the Philippines and served the ph.iherb.com store in pesos, down to a peso-denominated free-shipping threshold. We attempted to force a United States locale using browser language, timezone and cookie settings and the site would not move. Publishing converted peso figures as if they were American prices would be exactly the kind of invention this site criticises, so we have published none. That also means we could not verify the United States free-shipping threshold or any shipping cost.
3. Legitimacy, and the limits of what we checked
There is no licensing regime for supplement retail comparable to the one governing a telehealth prescriber, so the relevant questions are longevity, transparency and whether the operation behaves like a real business. On those, iHerb is straightforwardly legitimate: its own site dates the business to 1996, it operates its own house labels, its returns and shipping terms are published in plain language, and its robots.txt permits crawling with no restrictions on AI agents. This is not a fly-by-night storefront and nothing in this review should be read as suggesting it is.
The advertiser's own description claims 35,000 products from over 1,500 brands shipped to more than 150 countries. We have not verified any of those three figures and are reporting them as claims. This affiliate programme targets the United States, so nothing here should be taken as a statement about availability elsewhere.
Two things stopped us going further. Product detail pages were behind a bot challenge — an interstitial that appeared instead of the page content — so we did not open the California Gold Nutrition GLP-1 Supreme listing itself and cannot report its supplement facts panel, doses, or the wording of its structure-function claims and FDA disclaimer. We did not attempt to defeat that challenge. Everything we say about that product comes from its name and its appearance in iHerb's own search and category listings, which is enough to make the point about naming but not enough to assess the formula. Separately, we could not obtain independent review-platform ratings for this retailer, so no aggregate score appears here.
Related reading on this pattern
Naming a supplement after a drug it does not contain is now common enough that we have written about it several times. Gentle Patches is the clearest example we have covered — a transdermal patch sold as GLP-1 support containing berberine, green tea and cinnamon at undisclosed doses, which we rated 1.2. FullWell Fertility is the collagen version of the same mistake: a GLP-1 bundle using collagen for lean mass. And Swanson is the counter-example, a retailer that sells berberine without ever invoking the drug. Gentle Patches · FullWell Fertility · Swanson.
In its favour
- Long-established discount retailer, trading since 1996 by its own account, with a very large catalogue.
- The items that genuinely help during rapid weight loss are all here and inexpensive.
- 90-day returns on its own brand products bought on site — longer than most retailers give on anything.
- Return terms published plainly: 48-hour response, 14 days to ship, free domestic labels, 7-10 day refunds.
- No subscription, no consultation gate, no eligibility hurdles, and a substantial rewards programme.
- Sells the correct proteins — whey, soy, pea blends — alongside the collagen ones.
- robots.txt permits crawling with no restrictions on AI agents.
Against it
- Runs a merchandised GLP-1 Formulas destination; searching GLP-1 returned 757 results, none of them the drug.
- Its own house label carries four GLP-1-named products, including one called GLP-1 Supreme.
- The house GLP-1 protein formula is built on collagen peptides, the wrong protein for preserving muscle.
- Berberine is sold throughout the category, including as a transdermal patch, a format we rate poorly.
- We could not view United States prices at all — the site pinned us to a peso store and would not switch.
- Product pages sat behind a bot challenge, so we could not read any supplement facts panel or dose.
- No independent review-platform rating was available to us for this retailer.
Use iHerb if
You know what you want and you want it cheaply. For complete protein, fibre, vitamin D, B12, a basic multivitamin and electrolytes, a large discount retailer is the right kind of shop and this is a credible one, with a good returns policy and a rewards scheme that is worth joining if you buy regularly. Go in with a list, use the search box for the ingredient rather than browsing the themed category, and check the price yourself since we could not.
Look elsewhere if
You want a retailer that will not merchandise your medication back to you, in which case Swanson is the one we rated higher and largely for that reason. Also look elsewhere if you need published third-party testing certificates for a specific lot before you buy, since we could not reach product pages to assess what documentation is offered — and if you are hoping a supplement will do what a prescription does, no retailer can help with that.
Our verdict: 3.1 out of 5
A legitimate cheap retailer for everything that actually helps — which has built a 757-result category around a drug it cannot sell, and put its own name on four of the products.
Take the retailer on its own terms first, because it deserves that. iHerb has been trading since 1996, publishes its returns policy in plain language, gives 90 days on its own brand products and 30 on everything else, answers return requests inside 48 hours and pays for domestic return labels. It has an enormous catalogue and discount pricing. For a reader who needs whey protein, psyllium, vitamin D, B12 and a multivitamin — which is close to the entire list of supplements with a sensible role during rapid weight loss — this is a perfectly good place to buy them, and the unbranded versions are the cheap ones.
Then look at what has been built on top. Searching GLP-1 on 12 August 2026 returned 757 results and an invitation to a dedicated GLP-1 Formulas page. The names in that category are GLP-1 Supreme, Super GLP-1 Support, GLP-1 Complete, GLP-1 PRO, GLP-1 Fusion, GLP-One+, Support GLP-1 Production, and one product called nothing but GLP-1. Not one of them contains a GLP-1 receptor agonist, because no retailer can sell one without a prescription. The names work by association with medicines that do something these capsules do not do, and the association is the product.
The part that moves this from an observation about the industry to a criticism of this company is the house label. California Gold Nutrition runs throughout iHerb's own iHerb Brands page, and under it we found four products using the drug class in the name. A retailer can fairly say it stocks what brands produce and lets customers choose. It cannot say that about a product it named itself. Worse, the house GLP-1 Support Formula is built on collagen peptides — an incomplete protein with no tryptophan and very little leucine — when the one nutritional priority that actually matters on these drugs is preserving lean mass, for which collagen is close to the least useful protein you could pick.
We know this was a choice, because we have watched another retailer decline it. Swanson has been selling supplements since 1969, stocks berberine like everyone else, and had no mentions of Ozempic anywhere on its site; its own article about GLP-1 medications pointed readers toward diet and exercise rather than a formula. Same opportunity, same shelves, opposite decision. That comparison is why Swanson sits at 4.2 in our ratings and iHerb does not.
Three-point-one, held up by the retail fundamentals and pulled down by the category and the house label. Two honest gaps you should weigh: our connection was geolocated to a Philippine store in pesos and would not switch to the United States, so we have published no prices at all rather than convert them, and product pages sat behind a bot challenge we did not try to get around, so we never read a supplement facts panel. Buy the boring things here and they will serve you well. Walk past the shelf with your medication's name on it — including the ones with iHerb's own name underneath — and if you want the reasoning rather than the recommendation, we are paid 13% either way.
Frequently asked questions
What is iHerb?
A large online retailer of supplements and wellness products. Its own site says it has been trading since 1996, and the advertiser describes it as delivering 35,000 products from over 1,500 brands to more than 150 countries — figures we are attributing rather than confirming. This affiliate programme targets the United States. It is a genuine, long-established discount retailer, not a telehealth service or a single-product brand, and it also sells its own house labels alongside third-party ones.
Does iHerb sell GLP-1 medication?
No, and nothing on this page should suggest otherwise. Semaglutide and tirzepatide are prescription-only medicines dispensed by pharmacies. Everything iHerb sells under a GLP-1 heading is a dietary supplement — probiotics, prebiotic fibre, berberine, Akkermansia, collagen, amino acids, botanical extracts. None of them contain a GLP-1 receptor agonist and none are a substitute for one.
So what is the problem with the GLP-1 category?
That it exists as a merchandised category at all. Searching GLP-1 on iHerb on 12 August 2026 returned 757 results, the search results page offers a dedicated GLP-1 Formulas page, and the phrase GLP-1 Formulas itself returned 510. Product names in that category include GLP-1 Supreme, Super GLP-1 Support, GLP-1 Complete, GLP-1 PRO, GLP-1 Fusion, GLP-One+, Support GLP-1 Production and simply GLP-1. Those names borrow the credibility of a class of prescription drugs that works by an entirely different mechanism, and they exist because those drugs created the demand.
Are iHerb's own products in that category?
Yes, which is the part we find hardest to excuse. California Gold Nutrition is one of iHerb's house labels — it appears throughout iHerb's own iHerb Brands category page — and we counted four distinct California Gold Nutrition products using GLP-1 in the product name: GLP-1 Supreme with Akkermansia, Berberine, Quercetin and Curcumin; Akkermansia + Probiotics GLP-1 Complex; and a GLP-1 Support Formula with Collagen Peptides, Prebiotic Fiber and Essential Amino Acids in three sizes and flavours. A retailer stocking what brands send it is one thing. Naming your own product GLP-1 Supreme is a decision made in-house.
Their GLP-1 Support Formula has protein in it. Is that useful?
The idea is right and the ingredient is wrong. Preserving lean mass is the single most important nutrition goal during rapid weight loss, so a protein product aimed at GLP-1 users is a sensible thing to build. But the protein in that formula is collagen peptides, and collagen is a poor choice for muscle: it is an incomplete protein, it contains no tryptophan, and it is very low in leucine, the amino acid that does most to trigger muscle protein synthesis. Whey, soy and well-formulated pea blends are complete and leucine-rich. The formula does add essential amino acids, which helps, but if your goal is holding on to muscle, a plain tub of whey or pea protein is the better buy and iHerb sells plenty of it.
Does berberine work like Ozempic?
No. Berberine is the recurring active ingredient across this category — it is in iHerb's own GLP-1 Supreme, in LifeSeasons GLP-1 Support, in several standalone products, and even in a transdermal berberine patch stocked on the site. Trials have found modest effects on blood glucose and lipids, which is a real if unremarkable finding, but that is not the mechanism or the magnitude of a GLP-1 receptor agonist, and the nickname it has acquired online oversells it enormously. It also is not free of consequence: berberine inhibits CYP3A4 and can therefore affect the levels of other medicines you take, and it is not recommended in pregnancy or breastfeeding.
What should I actually buy there if I am on a GLP-1?
The boring things, which is where iHerb is genuinely good value. A complete protein — whey, or a pea and rice blend if you avoid dairy — to support lean mass alongside resistance training. Fibre, because constipation is one of the most common complaints on these drugs. A basic multivitamin, vitamin D and vitamin B12, because eating substantially less food means taking in fewer micronutrients. Electrolytes if you are struggling with fluid intake. None of that needs a GLP-1 label on the tub, and the unlabelled versions are usually cheaper.
Is there anything I should be careful about combining?
Yes, and it is worth a conversation with your prescriber rather than a decision made in a checkout. These medicines slow gastric emptying, which can change how and when oral medicines and supplements are absorbed, so timing matters more than usual. Bulk-forming fibre such as psyllium needs to be taken with plenty of fluid and is worth raising with a clinician if your gastric emptying is significantly delayed. Botanical extracts including berberine can interact with prescription drugs through liver enzymes. And supplements in the United States are not approved by the FDA before sale, so the burden of checking falls on you.
What are iHerb's return terms?
Better than average, and one part is genuinely good. Its returns page states 30 days for most products bought on iHerb.com or the app, and 90 days for iHerb's own brand products bought there — a longer window on its own labels than most retailers give on anything. Items bought through Amazon or Walmart get 30 days regardless. Requests are answered within 48 hours, you then have 14 days to send the package, domestic return labels are free, international returns get no prepaid label, and refunds are processed once the item arrives in original condition, taking 7 to 10 business days to appear.
Why does this review not list any prices?
Because we could not see United States prices and we will not convert foreign ones and present them as American. The site geolocated our connection to the Philippines and served us the ph.iherb.com store in pesos throughout, including a peso free-shipping threshold. We tried forcing a US locale with browser settings and cookies and could not shift it. Rather than approximate, we have left prices out entirely and told you why. Check the current price yourself before ordering.
How does it compare to other supplement retailers?
The most useful comparison is with Swanson, which we reviewed separately and rated 4.2. Swanson has been trading since 1969, sells berberine like everyone else, and yet had no mentions of Ozempic anywhere on its site, with its own GLP-1 article steering readers toward diet and exercise rather than supplements. That is the same commercial opportunity iHerb faced. One retailer declined it and one built a category page around it, and the difference is a choice rather than an industry constraint.
How much do you earn from this?
Thirteen per cent of whatever you spend, which is a healthy rate. The honest consequence is that the advice in this review costs us money: we are telling you to buy unbranded whey protein and a cheap multivitamin rather than a premium product with GLP-1 on the label, and the premium product would pay us more.
Go in with a list, not a category
Search for the ingredient — whey or pea protein, psyllium, vitamin D3, B12, a basic multivitamin, electrolytes — rather than browsing the GLP-1 shelf. Check prices yourself; we could not see United States pricing. And take the timing of any supplement to your prescriber, because these medicines slow gastric emptying and that changes absorption.
Visit iHerb (affiliate link)Search results, category listings and policies verified 12 August 2026 and subject to change.
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Read Review →Medical disclaimer
This article is informational and is not medical advice. No dietary supplement is a substitute for a prescribed GLP-1 receptor agonist, and no product described here contains one. Dietary supplements sold in the United States are not approved by the FDA for safety or effectiveness before marketing. Discuss any supplement with the clinician managing your treatment before starting it, particularly if you take prescription medication: GLP-1 receptor agonists slow gastric emptying, which can alter the absorption and timing of oral medicines and supplements, and botanical extracts including berberine can interact with prescription drugs through liver enzyme systems such as CYP3A4. Berberine is not recommended during pregnancy or breastfeeding. Bulk-forming fibre supplements require adequate fluid intake and warrant clinical advice if gastric emptying is significantly delayed. Persistent vomiting, severe abdominal pain, or an inability to keep fluids down while taking these medicines needs prompt medical attention rather than a supplement.
Sources · date reviewed: 12 August 2026
- iherb.com search results for the term GLP-1, retrieved in a browser 12 August 2026 — 757 results, with the results page offering a link to a dedicated GLP-1 Formulas page. A separate search for GLP-1 Formulas returned 510 results. Source for the product names quoted, including California Gold Nutrition GLP-1 Supreme with Akkermansia, Berberine, Quercetin & Curcumin; California Gold Nutrition Akkermansia + Probiotics GLP-1 Complex; California Gold Nutrition GLP-1 Support Formula with Collagen Peptides, Prebiotic Fiber & Essential Amino Acids in three variants; Force Factor Super GLP-1 Support and Super GLP-1 Support + Akkermansia; 21st Century GLP-1; Pendulum GLP-1 Probiotic; Lemme Reset Support GLP-1 Production; Vital Nutrients GLP-1 Complete; LifeSeasons GLP-1 Support With Berberine HCl; Bariatric Fusion GLP-One+ with Hops Extract; Codeage GLP-1 Probiotic+, GLP-Advantage+ and GLP-1 Collagen Peptides Powder; Triquetra Health GLP-Pre and GLP-Pro; Nature's Craft GLP-1 Fusion; Ageless Foundation Laboratories GLP-1 PRO; and PatchAid Berberine Patch.
- iherb.com/c/iherb-brands — retrieved 12 August 2026, listing 960 results. Source for confirming that California Gold Nutrition is one of iHerb's own house labels rather than a third-party brand.
- iherb.com/info/returns — retrieved 12 August 2026. Source for the 30-day window on most products and 90-day window on iHerb brand products purchased on iHerb.com or the app, the 30-day window for purchases made through other platforms such as Amazon and Walmart, the 48-hour response commitment, the 14-day period to return the package after approval, free domestic return labels with no prepaid labels for international returns, refunds processed on receipt in original condition, and the 7 to 10 business day refund timeline with international refunds taking up to 35 days.
- iherb.com/info/shipping and iherb.com site header — retrieved 12 August 2026. Source for the statement that iHerb has operated since 1996, for the rewards figures of more than $98.2 million in credits rewarded in 2025 across more than 3.9 million orders using rewards, and for the 20% first-order email signup offer. The free-shipping threshold displayed to us was denominated in Philippine pesos; we could not obtain the United States threshold.
- Katalys offer listing #1303, retrieved 12 August 2026 — 13.00% default commission, NET 85 payment terms, United States targeting, Content channel only. The advertiser's own description claims 35,000 products from over 1,500 brands delivered to more than 150 countries; we have not verified those figures.
- iherb.com/robots.txt — retrieved 12 August 2026, containing no restrictions on Anthropic or other AI crawlers. Product detail pages nevertheless returned a bot-challenge interstitial rather than page content; we did not attempt to bypass it, and therefore read no supplement facts panel, dose or product-page disclaimer for any item named in this review.
- Nutrition context: collagen is an incomplete protein lacking tryptophan and low in leucine, the branched-chain amino acid principally responsible for stimulating muscle protein synthesis, making it a poor primary protein source where the goal is preservation of lean mass; whey, soy and appropriately formulated pea-rice blends are complete and leucine-rich. Preservation of lean mass during rapid weight loss is influenced by protein intake and resistance training. Reduced total energy intake reduces micronutrient intake proportionally.
- Pharmacology context: berberine has been studied for modest effects on glycaemic and lipid markers and inhibits CYP3A4, creating potential for interaction with drugs metabolised by that pathway; it is not recommended in pregnancy or lactation, and it does not act as a GLP-1 receptor agonist. Akkermansia muciniphila is an active area of metabolic research and is not an approved treatment. GLP-1 receptor agonists delay gastric emptying, which can affect absorption of concomitant oral products. Dietary supplements are not subject to FDA pre-market approval for safety or efficacy.
- Comparative figures for Swanson are taken from our own separately published review of that retailer, which recorded trading since 1969, a 100-day full-refund window with a 20% fee on returns over $500, zero mentions of Ozempic sitewide despite berberine being stocked, and its own GLP-1 article recommending diet and exercise over supplements.
Limitations, stated plainly. We published no prices because the site geolocated us to the Philippine store and served pesos throughout; attempts to force a United States locale via browser language, timezone and cookies failed, and converting foreign prices into dollars would have meant inventing figures. We therefore could not verify United States shipping costs, the free-shipping threshold, or the cost of any product named here. Product detail pages were behind a bot challenge, so we did not read a single supplement facts panel, ingredient dose, structure-function claim or FDA disclaimer; our criticism of the GLP-1 category rests on product naming and category placement, which we verified, and not on formulation, which we could not assess. We did not place an order, so we did not observe checkout, delivery, or the returns process in practice. We did not obtain any independent review-platform rating for iHerb. We did not verify the advertiser's claims of 35,000 products, 1,500 brands or 150 countries. We did not contact iHerb before publishing.
Affiliate disclosure
GLP1Drugs.org is paid a 13% commission on purchases made through the links on this page. We have rated iHerb 3.1 out of 5, documented that a search for GLP-1 returns 757 supplement results and a dedicated category page, identified four products carrying iHerb's own house label that use the drug class in the product name, criticised the house GLP-1 protein formula for using collagen where a complete leucine-rich protein is required, and directed readers toward cheap unbranded protein, fibre and vitamins rather than the premium products that would pay us more. No company reviewed here sees or approves our copy before publication.