Codeage GLP-1 Probiotic+ & GLP-Advantage+ Review

Codeage is a direct-to-consumer supplement brand that sells, among many other SKUs, a pair of products built around the most-searched term in weight loss right now: GLP-1, the appetite hormone that drugs like Ozempic, Wegovy and Zepbound imitate at pharmacological strength. The line — sold under names like "GLP-1 Probiotic+" and "GLP-Advantage+" — is the classic kitchen-sink formula: a long ingredient deck that stacks berberine, chromium, green tea extract, gymnema, an Akkermansia-style probiotic and a handful of botanicals and fibers into one capsule, with the GLP-1 name on the front. So we did what we do with every product on this site — we set the marketing aside and read what is actually on the label and what each of those ingredients has actually done in human trials. The gap between the name and the evidence is the whole review.

Here is the short version, stated plainly so no one can miss it: Codeage's GLP-1 products contain no GLP-1 drug, no semaglutide, no tirzepatide and no prescription medicine of any kind. They are multi-ingredient botanical-and-probiotic blends. Every individual active in them has, at best, modest human evidence on its own — and several have weak, marker-only or negative data. And critically, there is no published randomized trial of the finished Codeage product, so the central marketing premise — that stacking many "GLP-1-supporting" ingredients adds up to a drug-like result — has never been tested. A long ingredient list is not the same as a strong one. If you came here asking whether this is "Ozempic in a capsule," the honest answer is no, and it is not close.

What's actually in the bottle

Codeage's GLP-1 SKUs are kitchen-sink formulas — the marketing virtue is supposed to be breadth, the idea that more "metabolic" and "GLP-1-supporting" ingredients in one capsule must work better than any one alone. The actual deck varies by SKU, but the recurring headline actives are the same handful you see across this whole category: berberine, chromium, green tea extract (EGCG), gymnema sylvestre, and an Akkermansia-type probiotic, padded out with prebiotic fibers and assorted botanicals. The honest way to evaluate a blend like this is to take it apart and grade each ingredient on its own human evidence — because that is the only evidence that exists. There is no trial of the combination.

Berberine. This is the strongest single ingredient in the deck, and the one that earns the "nature's Ozempic" headlines. Berberine is a plant alkaloid with genuine, repeatedly demonstrated effects on blood sugar and lipids: a classic randomized trial found it lowered blood glucose and improved lipids in people with type 2 diabetes¹, and a meta-analysis confirms a real glucose-lowering effect across trials². But read it precisely — the well-replicated berberine data is glycemic and lipid, concentrated in people with existing metabolic dysfunction, and the weight effect is a few pounds at most, nowhere near a medication. We lay out the full picture, including why it is not an Ozempic substitute, in is berberine 'nature's Ozempic'? and berberine for weight loss.

Chromium (picolinate). Chromium is a perennial fixture of metabolic blends, and its weight-loss evidence is among the weakest in the formula. A meta-analysis of randomized trials found chromium picolinate produced only a tiny, arguably trivial reduction in body weight³, and a conservative Cochrane review concluded the effect on overweight or obese adults was small and of questionable clinical relevance⁴. It is a filler-tier ingredient — we explain why in chromium picolinate for weight loss.

Green tea extract (EGCG). The catechin-and-caffeine story is real but small: a systematic review of green-tea catechins with or without caffeine found only minor effects on body weight and waist, and the catechin effect shrank substantially once caffeine was accounted for⁵. Much of green tea's modest signal is simply the stimulant it is delivered with — and concentrated extract carries a documented (if uncommon) liver-injury risk that brewed tea does not, covered in green tea extract for weight loss.

Gymnema sylvestre. The "sugar destroyer" has one genuinely interesting trick: gymnemic acids temporarily block sweet-taste receptors on the tongue⁶, and a placebo-controlled experiment showed a gymnemic-acid lozenge reduced short-term consumption of high-sugar food⁷. But a meta-analysis of its effect on glycemic control in type 2 diabetes found the evidence thin and inconsistent⁸. It is a short-term craving nudge, not a weight-loss engine — see gymnema's 'sugar destroyer' reputation.

Akkermansia-type probiotic. The "GLP-1" framing leans hardest here. The mechanism is real — Akkermansia muciniphila secretes a protein (P9) that stimulates GLP-1 secretion — but that was shown in mice⁹. The strongest human data is a 32-person, three-month proof-of-concept pilot that found pasteurized Akkermansia safe and tolerated and improved insulin sensitivity, but did not demonstrate meaningful weight loss or a measured GLP-1 rise in people¹⁰. We dig into exactly how thin that is in Akkermansia supplements for weight loss.

The 'kitchen-sink' premise is the problem

Put the deck together and the marketing logic falls apart on inspection. The premise of a kitchen-sink GLP-1 formula is additive: berberine plus chromium plus green tea plus gymnema plus a probiotic must equal more than any one alone. But that is not how supplement evidence works, for two concrete reasons.

First, the human trials behind each ingredient used a specific, often substantial, dose of that ingredient by itself. Berberine's glycemic data comes from roughly 0.9–1.5 grams a day, usually split into multiple doses¹²; the green-tea anthropometric trials used concentrated catechin doses⁵; gymnema's craving effect was a lozenge applied directly to the tongue⁷. A single daily capsule that has to fit berberine, chromium, green tea, gymnema, a probiotic and fibers cannot deliver each one at its studied dose — there is not enough room. So the most likely reality of a kitchen-sink blend is that the ingredients with real evidence are present at sub-therapeutic, decorative amounts, chosen so they can appear on the label, not so they can reproduce the trial. An under-dosed active is a marketing ingredient, not a functional one.

Second, and decisively, there is no published randomized trial of the finished Codeage product. "Each ingredient has a study" is not the same as "this product has a study" — and combining several modest, separately-tested ingredients does not predictably stack their effects. Interactions, absorption competition and dose dilution can just as easily cancel benefits as add them. The only honest grade for the combination is none: it has never been tested as a whole in humans. This is the exact pattern we flag across the category in our review of GLP-1 booster supplements — a product that "supports GLP-1" on a marketing slide is selling you a list of mechanisms, not a measured result.

Codeage vs the drug it's named after

Put the capsule next to the prescription and the mismatch is clean. Even being generous and crediting every ingredient at its best individual evidence, the ceiling for this kind of blend is a few pounds beyond diet — the modest, marker-level benefits of berberine and the rest. A GLP-1 receptor agonist does something categorically different: it floods the GLP-1 receptor at supraphysiologic levels, which is why the pivotal STEP 1 trial of semaglutide produced about 15% mean body-weight loss over 68 weeks¹¹, and the SURMOUNT-1 trial of tirzepatide produced roughly 20%¹². A handful of gentle metabolic nudges stacked in a capsule and a molecule that saturates the receptor are not the same category of intervention, and no honest reading of the data treats them as interchangeable. The gap is roughly an order of magnitude.

So is Codeage a scam?

No — and we want to be fair. Codeage uses real, named ingredients with real (if modest) literature behind some of them, and berberine and the Akkermansia mechanism in particular are among the more scientifically interesting things in the metabolic-supplement aisle. There is nothing fraudulent about selling a botanical-and-probiotic blend. The honest objection is narrower and is about framing, dosing transparency and price: the "GLP-1" name implies a drug-like appetite effect the underlying ingredient science does not support, a single capsule almost certainly cannot deliver the studied dose of every active it lists, and the finished product has never been run through its own randomized trial. As of 2026 Codeage's GLP-1 SKUs run roughly $30–$50 for a one-month supply — cheaper than some celebrity blends, but still real money for a formula whose best-evidenced ingredient (berberine) you can buy as a single, properly-dosed, third-party-tested product for less.

If you want the one ingredient in this deck that actually earns its place, the smarter move is usually a single-ingredient, disclosed-dose product rather than a proprietary stack — covered in our best berberine supplement guide — so you know exactly what you are taking and can match the studied dose.

How to think about buying it

If you want to try Codeage's GLP-1 line, set expectations that match the ingredient data rather than the name. A defensible case exists if you simply want a convenient, broad metabolic-support blend and you treat any scale movement as a small bonus layered on top of diet, protein, fiber and sleep — not the engine of weight loss. Check the label for disclosed milligram amounts (not a hidden "proprietary blend") so you can see whether the berberine and green tea are actually at studied doses, and clear it with a pharmacist if you take prescription medication — berberine inhibits CYP3A4 and P-glycoprotein and can raise blood levels of statins, blood thinners and other drugs.

What you should not do is buy it expecting it to stand in for, or work like, a prescription GLP-1. If meaningful, drug-like weight loss is the goal, the honest magnitude comparison is laid out in our supplements vs GLP-1 drugs breakdown, and for the broader question of whether any over-the-counter "GLP-1" product earns its name, start with do 'natural GLP-1' supplements work?. For how this blend stacks up against the rest of the OTC field, see our best OTC GLP-1 supplements scorecard.

The bottom line

Codeage's GLP-1 Probiotic+ and GLP-Advantage+ are kitchen-sink blends — berberine, chromium, green tea, gymnema and an Akkermansia-type probiotic in one capsule — with a powerful name on the front and no GLP-1 drug inside. Each ingredient has, at best, modest individual human evidence (berberine the strongest; chromium and gymnema among the weakest), the single-capsule format almost certainly under-doses the actives that matter, and there is no published trial of the finished combination — so the additive "more ingredients = more power" premise is untested. The whole product produces, at most, the few-pounds-beyond-diet ceiling of its best ingredient, an order of magnitude below the 15–20% body-weight loss prescription GLP-1 drugs deliver. It is a reasonably-priced, broadly-formulated metabolic supplement wearing a drug's name. For where this lands among everything we have vetted, see our best natural GLP-1 supplements hub, and for the full category framework, start with our pillar, 'natural GLP-1' supplements: what the evidence shows.