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Safety11 min readAugust 2, 2026
ColonBroom GLP-1 Booster Review 2026: We Could Not Find Out What Is In It
We set out to review a supplement and could not complete the most basic step: reading the label. ColonBroom's own blog gives two different ingredient lists for this product, its roundup of the best GLP-1 supplements puts its own product first, and no supplement facts panel is reachable from the site.
By Med Consumer Watch Team
ColonBroom is one of the largest direct-to-consumer supplement brands in the US gut-health category. Its original product is a psyllium husk fiber powder. Its newer one is the GLP-1 Booster, marketed on the homepage as an "effective weight loss" and "appetite control supplement" and a "natural GLP-1 booster," with 12.3k customer reviews claimed.
We tried to review it on August 2, 2026. We have no affiliate relationship with ColonBroom, and this review is unpaid.
We could not finish the job, and the reason is the review.
We could not read the label. Not because it is hidden in a proprietary blend — the more ordinary way that happens — but because we could not reach a supplement facts panel at all. The product URLs we tried returned a 404, an empty page, or nothing. The homepage lists the product and its claims but no ingredients, no doses and no price. What the site offers instead is a quiz: *"Take our short quiz and get a personalized product recommendation based on your answers!"*
Then, looking for the formula in the company's own content, we found it described two different ways in two different articles on ColonBroom's own blog.
Two Formulas, One Product, Same Website
ColonBroom publishes an explainer titled "What is ColonBroom GLP-1 Booster?" It names these active ingredients:
Berberine hydrochloride, resveratrol, quercetin dihydrate, zinc citrate.
ColonBroom also publishes a roundup titled "5 Supplements That Increase GLP-1 Naturally in 2026." Describing the same product, it names these:
Berberine, chromium picolinate, 5-HTP, saffron, bupleurum root.
One ingredient overlaps. Everything else is different.
We cannot tell you which is correct. Both are published by the manufacturer, about the manufacturer's own product, and neither carries a supplement facts panel with doses. It is possible the formula was reformulated and one article was not updated — which is a routine thing to happen and an easy thing to fix. It is also possible one of them is simply wrong.
Either way, the practical consequence for a buyer is the same: the manufacturer's website does not tell you what is in the capsule.
There is a further oddity. The footer disclaimer on the explainer page refers to a "recommended daily dose 11g." Eleven grams is a fiber-powder dose — it is roughly what a scoop of the original psyllium ColonBroom delivers. It is not a capsule dose. It reads like site-wide boilerplate written for a different product, sitting underneath this one.
The difference between those two ingredient lists is not cosmetic, and this is why it matters rather than being a pedantic complaint. The second list contains 5-HTP, a serotonin precursor that carries a serotonin syndrome risk when combined with SSRIs, SNRIs, MAOIs, tricyclics, triptans, tramadol or St John's wort. It also contains bupleurum, a botanical associated in case reports with drug-induced liver injury. If either is in the capsule, there are people who should not take it — and they cannot find that out from the label, because there isn't one they can read.
The Roundup That Ranks Its Own Product First
The second article deserves attention on its own.
"5 Supplements That Increase GLP-1 Naturally in 2026" is written in the format of an independent buyer's guide. It ranks five products. Here is the order:
- 1. ColonBroom GLP-1 Booster — "Best Overall"
- 2. Natnect GLP-1 Supplement
- 3. Lemme GLP-1 Daily
- 4. Pendulum GLP-1 Probiotic
- 5. Inno Supps Trim Biome GLP-1
We should be straight about our own position here, because it would be hypocritical not to. Med Consumer Watch is an affiliate site: we earn commissions on some of the products we review, we say so on every page that applies, and we maintain a disclosure page. The objection is not that a company has a commercial interest — everyone in this chain does. It is that a vendor's ranked roundup, formatted as a neutral buyer's guide and optimised to be found by people searching for one, does not read as advertising to the person who lands on it from Google. Ours is labelled. This one is not.
It is published on colonbroom.com. The winner is ColonBroom. The article describes its own product as standing out "as one of the most thoughtfully formulated options on the market" — an editorial judgement, in a ranked comparison, by the party being ranked.
Berberine: The One Ingredient Both Lists Agree On
Berberine appears in both versions of the formula, and it is almost certainly the reason this product is called a GLP-1 booster. It is also the ingredient that TikTok christened "nature's Ozempic" — a nickname that did more for the supplement industry than any advertisement could have.
So let us give it a fair hearing, because unlike much of this category, berberine is genuinely pharmacologically active.
What the evidence supports. Berberine has a substantial literature in glucose metabolism. Meta-analyses of randomised trials find it meaningfully lowers fasting blood glucose and HbA1c, with some analyses putting its glycaemic effect in the neighbourhood of low-dose metformin. It also improves lipid markers. Mechanistically it activates AMPK, and there is preclinical work showing effects on GLP-1 secretion. This is a real compound with real effects.
What the evidence does not support. Weight loss of the kind the marketing implies. Where berberine trials measure body weight, the effect is small — typically on the order of a couple of kilograms, and often less. It is a glucose drug in botanical clothing, not a weight-loss drug.
And the practical problem. Berberine's oral bioavailability is very poor — under 1% — which is why studied doses are high, generally 500 mg two or three times a day. If a capsule carries a token amount of berberine alongside four other things, it is unlikely to reach the exposure that produced the trial results. We cannot tell you what dose is in this product, for the reason described above.
Berberine's most underappreciated property is that it is a potent inhibitor of CYP3A4 and P-glycoprotein — the enzyme and transporter that handle a very large share of prescription drug metabolism. That means it can raise blood levels of other medications, including statins, certain immunosuppressants, some anticoagulants and many others. It also lowers blood glucose, which stacks with diabetes medication and can push you low. And it should not be taken in pregnancy or while breastfeeding: berberine displaces bilirubin from albumin, which in newborns is a kernicterus risk. If you take any prescription medication, berberine is a pharmacist conversation, not a casual purchase.
What ColonBroom Gets Right
It would be unfair to leave the impression that this is a company selling nothing of value, because that is not true.
The original ColonBroom product is psyllium husk, and psyllium is excellent. It is one of the best-evidenced supplements in existence: it improves stool consistency in both constipation and diarrhoea, lowers LDL cholesterol, blunts post-meal glucose rises, and increases satiety. It has decades of clinical data and an FDA-authorised health claim for soluble fiber and coronary heart disease. If you buy psyllium from ColonBroom, you are buying a genuinely useful substance.
It is also relevant to this site's readers specifically. Constipation is among the most common complaints on semaglutide and tirzepatide, and psyllium is a sensible, well-supported response to it.
The GLP-1 Booster is a different proposition from the fiber, and it should be judged separately. Our criticism is aimed at the capsule product, its documentation and the marketing around it — not at psyllium, and not at the idea that a fiber company should exist.
If what you want is psyllium, note that psyllium is a commodity. Generic psyllium husk powder is available at a small fraction of the branded price, in the same form, at the same dose. The premium you pay to a direct-to-consumer brand buys flavouring, packaging and marketing. It does not buy a better fiber.
Before You Buy Anything Through a Quiz Funnel
The quiz-first purchase flow is now standard across this whole category, and it is worth understanding as a mechanism rather than treating each brand as a special case.
A quiz does three things at once. It collects an email address before you have seen a price. It creates a sense that the recommendation which follows is personalised to you, when the output is usually the product the company wanted to sell. And it moves the price disclosure to the end of a process you have already invested effort in.
None of that is illegal, and plenty of legitimate companies do it. But it changes what you should do as a buyer:
- Find the price before you give an email address. If you cannot, that is information about the seller.
- Find the supplement facts panel before you buy. If the manufacturer's site will not show you doses, a retailer listing often will — check GNC, Amazon, Walmart or Target, where the label image is usually posted.
- Read the checkout page slowly. Look specifically for whether you are enrolling in a recurring subscription, at what interval, and at what price after any introductory discount.
- Screenshot the guarantee terms at the moment you buy. Money-back guarantees in this category frequently carry conditions — a return window, an unopened-product requirement, or a restocking fee.
- Cancel through the same channel you signed up through, and keep the confirmation. If cancellation requires an email or a phone call rather than a button in your account, note that before you subscribe rather than after.
If you are already on a GLP-1 medication, the specific risk with this product is not the fiber. It is berberine's glucose-lowering effect stacking on top of a drug that is already lowering your glucose, and berberine's CYP3A4 inhibition sitting alongside everything else you take. Tell your prescriber before you add it. That advice would be the same for any berberine product; it is sharper here because you cannot see the dose.
Who Should Buy It, and Who Shouldn't
Consider ColonBroom's psyllium if you want a fiber supplement with genuinely strong evidence, you like the flavoured format, and the convenience premium is worth it to you. Buy it for regularity, cholesterol and satiety — all supported — and compare the per-serving price against generic psyllium before you commit.
Consider berberine on its own if what you actually want is the glucose effect. Single-ingredient berberine is widely available, at the studied dose, from brands that publish a supplement facts panel and third-party testing. You will know what you are taking and how much. Clear it with a pharmacist first if you take any prescription medication.
Do not buy the GLP-1 Booster until ColonBroom publishes a reachable supplement facts panel with doses, and reconciles the two ingredient lists on its own blog. This is not a close call and it does not require any judgement about efficacy. You cannot give informed consent to a formula you cannot read — and with 5-HTP and bupleurum named in one of the two versions, there are readers of this page for whom that matters medically, not just as a principle.
And if the underlying goal is weight loss, the honest framing is the one we give on every page in this category: no over-the-counter capsule approaches what prescription GLP-1 therapy does. Our comparison of online GLP-1 programs sets out what supervised treatment actually costs, which is worth knowing before spending money here.
Frequently Asked Questions
What is in ColonBroom GLP-1 Booster?
We cannot tell you with confidence, and that is our central finding. ColonBroom's own blog describes it once as berberine hydrochloride, resveratrol, quercetin dihydrate and zinc citrate, and elsewhere as berberine, chromium picolinate, 5-HTP, saffron and bupleurum root. We could not reach a supplement facts panel with doses on the company's site.
Is ColonBroom GLP-1 Booster the same as the original ColonBroom?
No. The original is a psyllium husk fiber powder. The GLP-1 Booster is a separate capsule product sold alongside it, at retail in a 60-capsule, 30-serving size.
Does berberine really work like Ozempic?
No. Berberine has genuine, well-replicated effects on blood glucose and lipids, and some analyses compare its glycaemic effect to low-dose metformin. Its effect on body weight in trials is small, generally around a couple of kilograms or less. GLP-1 receptor agonists are a different order of intervention.
Can I take it with semaglutide or tirzepatide?
Ask your prescriber first. Berberine lowers blood glucose and inhibits CYP3A4 and P-glycoprotein, so it can interact with other medications and stack with the glucose-lowering effect of your GLP-1.
Who should avoid berberine entirely?
Anyone pregnant or breastfeeding, because berberine displaces bilirubin from albumin and poses a kernicterus risk to newborns. Also anyone taking medications metabolised by CYP3A4 or transported by P-glycoprotein, without checking with a pharmacist first.
What are the side effects?
Berberine commonly causes gastrointestinal effects — cramping, constipation or diarrhoea. If 5-HTP is in the formula, it adds serotonin syndrome risk for anyone on serotonergic medication. Without a verified label we cannot assess the rest.
Is the money-back guarantee real?
We could not retrieve the current guarantee terms from the site. Screenshot whatever terms are shown at checkout at the time you purchase, and read them for return windows and unopened-product conditions.
Is psyllium worth buying?
Yes, on its own merits. It is one of the best-evidenced supplements available, and it is particularly relevant if you are managing constipation on a GLP-1 medication. It is also a commodity — compare the branded price against generic psyllium husk.
The Bottom Line
Our rating: 3.9 / 10.
We rate what we can verify, and here the thing we could not verify is the label.
ColonBroom's website markets the GLP-1 Booster with claims — "effective weight loss," "appetite control," "natural GLP-1 booster" — and routes buyers through a quiz. What it does not do, anywhere we could reach on August 2, 2026, is show a supplement facts panel with doses. The formula then appears two different ways in two different articles on ColonBroom's own blog: berberine, resveratrol, quercetin and zinc in one; berberine, chromium picolinate, 5-HTP, saffron and bupleurum in the other. A footer disclaimer on a capsule product refers to an 11-gram daily dose, which is a fiber-powder number.
That is disqualifying on its own, and it is disqualifying for a safety reason rather than a fussy one. 5-HTP carries serotonin syndrome risk for anyone on an antidepressant, and bupleurum has case reports of liver injury. One of ColonBroom's two published lists contains both. A person on an SSRI has no way to make an informed decision here.
The one ingredient both lists agree on — berberine — is real and worth respecting. It has solid glucose and lipid data, poor bioavailability that makes dose critical, and a genuine interaction profile through CYP3A4 and P-glycoprotein that puts it off-limits in pregnancy and makes it a pharmacist conversation for anyone on prescription medication. All of which makes the missing dose matter more, not less.
And the roundup that ranks ColonBroom's own product first among five GLP-1 supplements, published on ColonBroom's own domain in the format of an independent buyer's guide, tells you what kind of information environment you are shopping in.
The psyllium is good. Buy that if you want fiber, and compare it against generic. We cannot recommend a capsule whose contents the manufacturer describes two ways and publishes neither.
Sources & References
- ColonBroom — homepage: product range, GLP-1 Booster marketing claims ("effective weight loss," "appetite control supplement," "natural GLP-1 booster"), 12.3k claimed reviews, and the quiz-based recommendation funnel (checked August 2, 2026)
- ColonBroom blog — "What is ColonBroom GLP-1 Booster?": ingredient list given as berberine hydrochloride, resveratrol, quercetin dihydrate and zinc citrate; footer disclaimer referencing an 11 g recommended daily dose (checked August 2, 2026)
- ColonBroom blog — "5 Supplements That Increase GLP-1 Naturally in 2026": ranks ColonBroom GLP-1 Booster first among five products on ColonBroom's own domain, and describes the formula as berberine, chromium picolinate, 5-HTP, saffron and bupleurum root (checked August 2, 2026)
- GNC retail listing — ColonBroom GLP-1 Booster, 60 capsules (30 servings)
- Published pharmacology of berberine: AMPK activation, glycaemic and lipid effects in randomised trials and meta-analyses, oral bioavailability below 1%, typical studied dosing of 500 mg two to three times daily
- Berberine drug-interaction profile: inhibition of CYP3A4 and P-glycoprotein; additive glucose lowering with antidiabetic medication; contraindication in pregnancy and breastfeeding due to bilirubin displacement from albumin and kernicterus risk in neonates
- Clinical guidance on serotonin syndrome and 5-HTP as a serotonin precursor: interactions with SSRIs, SNRIs, MAOIs, tricyclics, triptans, tramadol and St John's wort
- Case-report literature associating bupleurum-containing preparations (including Sho-saiko-to) with drug-induced liver injury
- Evidence base for psyllium husk: stool consistency in constipation and diarrhoea, LDL cholesterol reduction, post-prandial glucose attenuation, and the FDA-authorised soluble fiber and coronary heart disease health claim
Medical Disclaimer
This article is for informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider before making decisions about your health or medications. Individual experiences may vary.