The short answer: to spot fake supplement reviews, look for six tells: a promised result on a timeline, words for illnesses the brand itself may not use, a wall of five-star ratings, no breakdown of the ratings, review text about a different product, and paid content with no disclosure. Then check whether the brand gives you anything to judge besides the stars: a full label and a batch document.
Knowing how to spot fake reviews matters more on a supplement page than almost anywhere else. A supplement is a product you mostly can’t evaluate by looking at it. You can’t see the milligrams, and whatever it does for you, it does slowly and privately. So the review section ends up doing the persuading, which makes it the most tempting thing on the page to fake.
This page is the checklist we would want if we were shopping. It closes with the part that’s awkward for us: this site has no customer reviews at all, and we explain why that’s the honest number.
What the FTC banned in 2024
In August 2024 the Federal Trade Commission announced a final rule on consumer reviews and testimonials. It’s codified at 16 CFR Part 465 and took effect on October 21, 2024. The FTC’s plain-English Q&A walks through each section. In short, a business may not:
- Write, buy or sell fake reviews. That includes reviews attributed to someone who doesn’t exist, such as AI-generated reviewers, and reviews that misrepresent the writer’s experience with the product.
- Pay for a particular opinion. Offering money, free product or anything else in exchange for a positive (or negative) review is banned. Asking for honest reviews in exchange for a free product isn’t banned by this rule, though the gift still has to be disclosed under the FTC’s Endorsement Guides (16 CFR Part 255).
- Hide insider reviews. Reviews from officers, managers, employees or their relatives need a clear disclosure of that relationship.
- Run a fake independent review site. A company can’t present a site it controls as impartial.
- Suppress bad reviews. No threats or false accusations to get reviews taken down, and no presenting the reviews shown as most or all of the reviews when negative ones are being held back.
- Buy fake followers or views to look more popular than you are.
The rule also gives the FTC the power to seek civil penalties, which the agency said case-by-case enforcement lacked.
One gap is worth knowing about as a shopper. The FTC had proposed banning review hijacking, where reviews written about one product get repurposed onto another. It left that out of the final rule, saying it could not resolve the concerns on the rulemaking record. So that one stays your job to catch, and tell 5 below is how.
Six tells in a supplement review section
1. A result with a date on it
“Slept through the night by day three.” “Focus like never before in a week.” A review promising a specific result on a specific timeline is the single most useful red flag in this category.
The FTC’s Health Products Compliance Guidance is clear that a brand can’t use a customer testimonial to make a claim it couldn’t make itself. So when the review section promises more than the label, the review section is doing the job the label isn’t allowed to do. Real reviews of supplements tend to be vaguer and more hedged, because real results usually are.
2. Illness words the brand can’t use
Supplements may describe what an ingredient does for the body’s normal structure or function, such as “supports calm” or “supports focus.” They may not claim to fix a disease, per the FDA’s rules on structure/function claims.
So watch for reviews that name a medical condition and say the product fixed it. Either the brand is pinning its own banned claim on a customer, or it’s hosting reviews it should know it can’t repeat. Neither is a good sign about how it handles the rest of the rules.
3. A wall of five stars
A product that thousands of different people have tried gets thousands of different reactions. Some people dislike the taste, some get a jar that arrived warm, some feel nothing and say so.
For scale: when we pulled marketplace data in September 2026, the best-selling reishi gummy on Amazon averaged 3.7 stars across more than 1,700 reviews. That’s what a real crowd looks like on a supplement: split opinions, specific complaints, and praise that sounds like a person wrote it.
4. No breakdown of the ratings
If a page shows an average and a count but won’t show you how many one-, two- and three-star ratings sit behind it, you can’t tell a real 4.6 from a filtered one. The rule bans presenting a filtered set as the whole set, but you can’t see the filter from outside. A visible breakdown, with the low ratings clickable, is the cheapest proof a brand can give that nothing was held back.
5. Reviews about a different product
Read five reviews in full and check that they describe this product: the right flavor, the right format, the right number of servings in the container. A capsule review under a gummy listing, or praise for a flavor that isn’t sold, usually means reviews were carried over from another listing. That’s the hijacking the final rule didn’t cover.
6. “Paid partnership” with the disclosure missing
A video or post that reads like an ad, from someone who got the product free or earns a commission on your purchase, has to say so under the Endorsement Guides. Simple wording like “I got this free to review” is enough. When a creator’s content is all glowing and there’s no disclosure anywhere, assume the relationship exists and was left out.
Why affiliate roundups are not reviews
Search “best mushroom supplement” and most of the first page is roundups: ten products, a winner, a buy button under each. Most of those pages earn a commission on every sale they send, and the FTC’s Endorsement Guides Q&A treats that commission as a connection readers need to be told about.
A roundup can still be useful. Read it as marketing that’s paid per sale, and look for what it doesn’t say: whether the writer bought the products, whether any lost, and whether a brand paid to appear. When we went through a month of TikTok videos about functional mushrooms in August 2026, the retail-side videos we found, 21 of them, were essentially all affiliate promotion. None of them was teaching anything.
What an honest review section looks like
You’ll know a trustworthy review section by what it’s willing to show:
- Labels on every review that wasn’t a plain purchase, such as “Received a free product for review” or “Verified purchase.”
- The low ratings stay up, with a breakdown you can click into.
- Dates, so you can see whether the reviews arrived steadily or in one suspicious week.
- Complaints about ordinary things: taste, texture, a melted jar, slow shipping, price. These are the reviews that sound like people, because they are.
- Nothing a label couldn’t say. No illness fixed, no result by Thursday.
And a brand worth trusting will give you something to check besides the reviews. The label should print every amount, and there should be a batch document you can open. Reviews are opinions about a product. The label and the certificate are facts about it.
Why Flow Botanicals shows zero reviews
This site has no customer reviews, ratings or testimonials. None, on any page, on any product, on any social account. That’s the true number today, and we’d rather show you a zero than a number we made up.
We won’t write reviews ourselves, and we won’t use AI-generated “customers.” Both are banned by the rule above, and both would make every other claim on this site worth less.
So until real reviews exist, judge us on the two things you can check without trusting us:
- The label. Every active in every product is printed with its own milligram amount. There is no proprietary blend in the range. How to read one is in how to read a mushroom supplement label.
- The batch documents. Every Certificate of Analysis we hold is on our certificates page, including the three that cover microbiology only. What a COA doesn’t tell you explains the gaps in them, in our own words.
When real reviews arrive, they’ll carry the labels described above, and the low ones stay up.
[SEAN DECISION BEFORE PUBLISH: if the gifted-review program in the proof plan is approved, replace the sentence above with: “We’re starting by sending free product to people who ask for it, in exchange for an honest review, positive or negative. Every one of those reviews will be marked ‘Received a free product for review.’” If not approved, keep the sentence above and delete this note.]
For the full list of checks we’d run on any supplement brand, including our own scorecard, see how to tell if a supplement brand is trustworthy. For the business line on the back of the bottle, see who actually made your supplement.
FAQ
Are incentivized supplement reviews illegal?
Not automatically. Under 16 CFR Part 465, a brand can’t offer anything in exchange for a review that has to be positive (or negative). It can give free product and ask for an honest review, but that review has to disclose the gift under the FTC’s Endorsement Guides.
Can a brand delete negative reviews?
It can’t use threats or false accusations to get reviews removed. It also can’t hold back reviews because of their rating or sentiment and then present what’s left as most or all of the reviews. It may apply the same moderation rules to every review, such as removing spam or off-topic posts, regardless of rating.
Are AI-written reviews allowed?
A review attributed to a person who doesn’t exist, including an AI-generated reviewer, is a fake review under the rule. So is a review that misrepresents someone’s real experience with the product.
Judge Flow Botanicals by its label and batch documents, not by stars. Every certificate we hold is on the Certificates of Analysis page, and every label is on its product page.