Yumz Lab Review – There Is No Psilocybin In These, and the FDA Calls Them Adulterated

These Are Not Magic Mushrooms

The products are sold under the words “magic mushroom gummies”. The first thing anyone considering them needs to know is that this description is pharmacologically wrong.

This mislabelling is a safety problem, not a pedantic one. Someone who has taken psilocybin before, and who reasons from that experience about what a “magic mushroom gummy” will do and how much to take, is reasoning from an unrelated drug. The word is doing work it has no right to do.

The FDA Position Is Explicit

Much of what we review sits in regulatory grey areas, and we usually have to explain nuance. Not here.

The FDA states that Amanita muscaria, its extracts, and the constituents muscimol, ibotenic acid and muscarine are not authorised for use as ingredients in conventional food.

It cites published literature, adverse event reports and poison control calls describing serious central nervous system effects including delirium, seizures, coma, respiratory depression, and potentially death.

“Adulterated” is a specific legal term, not a rhetorical one. Across this entire review series we have looked for FDA warning letters against dozens of brands and mostly reported not finding any. This is a category the FDA has affirmatively acted against, which puts it in a different position from every borderline supplement we have assessed.

What Has Actually Happened to People

Regulatory language can feel abstract, so here is the observed record.

The 44% figure is the one that should land. Amanita-coded products account for close to half of all mushroom poison centre calls in that period — from a category sold as a legal wellness gummy rather than as a foraged mushroom.

The child case is the predictable one. These are fruit-flavoured gummies in mango, mixed berry and watermelon. A gummy sweet is the single most attractive form a household toxin can take to a small child, and every argument that applies to cannabis edibles and child-resistant packaging applies here with more force, because fewer parents know what this is.

The Ratio Nobody Prints

This is the technical heart of the problem, and it will be familiar to anyone who read our review of an unlabelled kratom extract range last week.

The two compounds do opposite things:

• Muscimol — a potent GABAergic compound. Broadly sedative, and the effect the products are sold for.
• Ibotenic acid — a non-selective agonist at ionotropic glutamate receptors, particularly NMDA, mimicking glutamate and driving excessive neuronal calcium influx leading to excitotoxicity.

Manufacturing tries to deal with this by decarboxylation — heating drives ibotenic acid to lose carbon dioxide and become muscimol. The aim is to maximise muscimol and minimise unconverted ibotenic acid.

But the conversion is frequently incomplete in commercial products, leaving residual ibotenic acid that retains its excitotoxic properties. Which means the safety of any individual gummy depends on how well one manufacturing step went — and we found no disclosure of that ratio anywhere.

This is exactly the pattern we found in an unlabelled kratom extract line, where the compound determining both legality and danger was the one figure the seller did not print. Same structure, different molecule: a product whose risk is governed by a number the buyer cannot obtain.

The THCA Flower Loophole Closes on 12 November 2026

The other product line here is THCA hemp flower, and there is a genuinely urgent and checkable fact attached to it.

How the loophole works: federal hemp compliance testing measures delta-9 THC alone. So flower can carry a high percentage of THCA — which is not delta-9 — and still pass the 0.3% threshold.

At the time of writing that is roughly three months away. Anyone buying THCA flower now — particularly in any quantity, or on a recurring basis — is buying a product whose federal status changes inside the window in which they will still possess it. That is worth knowing before rather than after.

And the honest description of what THCA flower is: THCA converts to delta-9 THC at roughly 110 to 130°C — which is what happens whenever it is smoked, vaped or baked. The legal distinction rests on its state in the bag, not its state in your bloodstream. Used as intended it is not meaningfully different from marijuana, which is precisely why the rule is being changed.

State law varies independently and several states already restrict it, so federal timing is not the only question. Check your own jurisdiction.

It Will Fail a Drug Test

A practical point that costs people their jobs, and which “federally legal hemp” marketing actively obscures.

Once THCA is decarboxylated it produces the same THC-COOH metabolite that standard immunoassay panels detect. No drug test distinguishes hemp-derived THC from dispensary THC — they are the same molecule producing the same metabolite.

“It was legal hemp” is not a defence to a positive result, because the test is not measuring legality. If you are subject to workplace or court-ordered testing, this product will fail it.

On the Amanita side, muscimol and ibotenic acid are not on standard panels — and that is not reassurance. It means an emergency department treating someone who is delirious or seizing will not find the cause on a routine screen, which is exactly why the next section exists.

Who Must Not Take This

Beyond our general recommendation against it, absolutely not if you are:

• Pregnant or breastfeeding.
• Living with a seizure disorder, or taking anything that lowers seizure threshold. Seizures are among the reported effects, and the mechanism — NMDA-driven excitotoxicity — is directly relevant.
• Taking any sedative, benzodiazepine, opioid or alcohol. Muscimol is GABAergic; stacking GABAergic sedation is how respiratory depression happens.
• Taking any psychiatric medication, or living with a psychotic or bipolar disorder — delirium is a documented effect.
• Living with liver or kidney impairment.
• Anywhere a child could reach it. These are fruit-flavoured sweets.
• Driving or operating anything. Ataxia and delirium are reported effects.

If Someone Has Taken Too Much

That last instruction matters more than it sounds. These compounds do not appear on routine toxicology screens, and clinicians see this rarely. Saying “Amanita muscaria, ibotenic acid and muscimol” — rather than “mushroom gummies”, which will be heard as psilocybin — gives the treating team the right frame immediately. Do not downplay it, and do not delay because you are worried about getting in trouble.

How It Compares

Pros and Cons

Our Recommendation, and Harm Reduction If You Ignore It

Our recommendation is not to buy the Amanita products at all. That is the whole recommendation. This is a category the FDA has declared adulterated, whose neurotoxic constituent is undisclosed, sold under a name describing a different drug.

A page that only says no is not useful to someone who has decided otherwise, so:

• Do not treat prior psilocybin experience as relevant. It is a different drug. Whatever you know about dosing does not transfer.
• Never combine with alcohol, benzodiazepines, opioids or any sedative. This is the combination behind respiratory depression.
• Never alone. Delirium means you may be unable to recognise you need help or to call for it.
• Lock it away from children and pets. Fruit-flavoured gummies, and a child-sized dose is much smaller than yours.
• Keep the packaging so a hospital can be told exactly what was taken.
• Save 1-800-222-1222 in your phone before, not during.
• On THCA: check your state, note 12 November 2026, and do not buy it at all if you are subject to drug testing.

Limitations of This Review

We have not bought or tested any Yumz Lab product, and the FDA actions we cite concern the category rather than this seller. We found no recall or enforcement action naming Yumz Lab specifically, and we are not alleging one — our case is that the ingredient is one the FDA has said does not belong in food, whoever sells it.

The absence of an ibotenic acid figure is an absence we searched for and did not find; it is possible such data exists on packaging or a certificate we could not reach. Equally, we cannot say whether this manufacturer’s decarboxylation is thorough or poor — our point is that a buyer has no way to know, not that we know it is bad.

The hospitalisation and poison centre figures are surveillance data, which captures association rather than proven causation and reflects the whole Amanita gummy category across many brands. Legal timing is the fact most likely to change — the 12 November 2026 date and the total-THC formula are as reported at the time of writing, litigation and lobbying are ongoing, and state law moves independently. Verify current law yourself rather than relying on this page. We publish no customer satisfaction score. None of this is medical or legal advice.

Frequently Asked Questions

Verdict

Start with the name, because it is the first thing that is wrong. These are sold as “magic mushroom gummies” and contain no psilocybin. Amanita muscaria’s actives are ibotenic acid and muscimol, working on GABA-A and NMDA glutamate receptors rather than serotonin. Anyone reasoning about dose from prior psilocybin experience is reasoning about an unrelated substance — and that is a safety failure created by the marketing.

The regulatory position is unusually clear. The FDA alerted on this in December 2024 and in September 2025 declared such products adulterated, stating the mushroom and its constituents are not authorised as ingredients in conventional food, citing delirium, seizures, coma, respiratory depression and potentially death. Across this series we have searched for FDA warning letters against many brands and usually reported finding none. This is a category the agency has affirmatively acted against.

The harm is documented rather than theoretical: five hospital evaluations between September 2023 and June 2024 including a reported child, and nearly 44% of all mushroom-related poison centre calls in 2023–2024 involving Amanita-coded products. These are fruit-flavoured sweets, which is the most dangerous possible format for a household toxin.

And the mechanism is the part that decides the rating. Ibotenic acid drives NMDA-mediated excitotoxicity — it is used in neuroscience to create targeted brain lesions in laboratory animals. Manufacturers decarboxylate it into muscimol, but that conversion is frequently incomplete and the residual is not disclosed. The safety of a given gummy therefore rests on how well one manufacturing step went, and no buyer can find out. That is precisely the structure we found in an unlabelled kratom extract range — the number governing the danger is the number not printed.

The THCA flower is a separate and more mundane problem with a date on it. It is federally legal only because compliance testing measures delta-9 alone; from 12 November 2026 the threshold applies to total THC including THCA, reclassifying most of it as marijuana. That is about three months away. It also converts to delta-9 whenever heated, so it is not meaningfully different from marijuana in use, and it fails standard drug tests — “legal hemp” is no defence to a positive result.

Do not buy these. If you do anyway: never with alcohol or sedatives, never alone, never within reach of a child, keep the packaging, and put 1-800-222-1222 in your phone now. If something goes wrong, say “Amanita muscaria” — not “mushrooms” — because these compounds are not on routine toxicology screens and the treating team needs the right word.