Koi YEEHAW Mushroom Chocolate Bars
Koi YEEHAW Mushroom Chocolate Bars
YEEHAW is Koi's functional mushroom chocolate bar, and it is the odd one out in the catalog: no CBD, no THC, no cannabinoid of any kind. What it does contain is a blend Koi calls its "magic blend" alongside cordyceps, kanna, kava, l-theanine, citicoline and theobromine, in milk chocolate, cookies and cream, or strawberry milk.
Koi's own copy promises "waves of psychedelic clarity and expanded perception." That is a strong claim for a product whose active ingredients Koi does not quantify anywhere on the page, and it is the main reason this bar scores lower than the rest of the range despite being an interesting product.
Quick Verdict: Who Is This For
Buy this if you are already familiar with the functional mushroom and nootropic category, you know how you react to kava and kanna, and you want a well-made chocolate delivery format from a brand that at least publishes lab testing for its other lines.
Skip it if you take any antidepressant or drink regularly. Kanna acts on serotonin reuptake and should not be stacked with an SSRI; kava has a documented history of liver injury reports and does not belong anywhere near alcohol. This is the one Koi product where the ingredient list needs reading before the marketing.
Product Details
| Format | Chocolate bar |
| Flavors | Milk Chocolate, Cookies and Cream, Strawberry Milk |
| Listed ingredients | Proprietary blend, cordyceps, kanna, kava, l-theanine, citicoline, theobromine |
| Cannabinoids | None — no CBD, no THC |
| Sizes | Single $34.99, 3-pack $99.99, 5-pack $159.99 |
| Availability | All flavors and pack sizes in stock at the time of writing |
| Shipping | Cold-packed with an ice pack and insulated foil |
| Not for | Anyone on an SSRI, anyone who drinks with it, pregnancy, under 21 |
What This Does Well
The shipping is handled properly
Koi cold-packs every chocolate order with an ice pack and insulated foil. A lot of brands ship chocolate in a paper mailer in July and call the resulting puddle a shipping hazard. This is a real cost Koi has chosen to absorb.
A coherent ingredient stack
Cordyceps, l-theanine, citicoline and theobromine is a defensible nootropic combination — energy, calm focus, acetylcholine support and a mild stimulant, none of them exotic. Taken on its own that part of the formula makes sense.
Three flavors that are actually different
Milk chocolate, cookies and cream, and strawberry milk are distinct rather than three shades of the same bar, and the chocolate itself is good enough that you are not choking down a supplement.
Pros and Cons
Pros
- No cannabinoids, so no drug-test exposure
- Cold-pack shipping included, which most chocolate sellers skip
- Cordyceps, l-theanine and citicoline are sensible, well-studied ingredients
- Three genuinely distinct flavors
- All flavors and sizes in stock at the time of writing
Cons
- Koi does not disclose what the "proprietary magic blend" contains or at what dose
- Marketing promises psychedelic effects the ingredient list does not account for
- Kanna should not be combined with SSRIs or other serotonergic drugs
- Kava carries documented liver-injury reports and must not be mixed with alcohol
- $34.99 for a single bar is expensive for an undisclosed formula
Read the ingredient list before the marketing
Two of the named ingredients deserve caution rather than enthusiasm. Kanna (Sceletium tortuosum) acts as a serotonin reuptake inhibitor; combining it with an SSRI, SNRI, MAOI or triptan is the kind of stacking that causes serotonin syndrome, and that is not a theoretical risk. Kava has a real history of hepatotoxicity case reports, enough that several countries restricted it for a period, and it should never be taken with alcohol or by anyone with liver disease. Separately, Koi does not say what the proprietary blend is. In a category where "magic blend" usually means Amanita muscaria, a buyer is entitled to know the species and the amount, and a brand that publishes batch COAs for its hemp products could publish this too. Score this one on the disclosure, not the chocolate.
On drug testing
This bar contains no THC and no CBD, so nothing in it triggers a standard employment drug panel. That said, if you are subject to a safety-sensitive testing program, an undisclosed proprietary blend is a category of risk in itself — you cannot attest to what you took if you were never told.
Where to Buy
Sold direct by Koi, cold-packed. Buy a single bar first. At $34.99 that is not cheap for a trial, but it is a great deal cheaper than a five-pack of something you turn out to react badly to. In warm months pay for the faster shipping option and bring the package in promptly; Koi warns the chocolate can still soften, and refrigerating until firm fixes it.
Koi’s published refund policy gives a full refund on returns started within 90 days of purchase, and 50% back between 91 and 150 days. Shipping is free on orders over $69, and current discount codes are on our Koi coupon page.
FAQ
Does this contain psilocybin?
Koi does not say what is in the proprietary blend. It is not sold as a psilocybin product, and psilocybin is a federally controlled substance. Ask Koi directly if the exact composition matters to you — and it should.
Will it show up on a drug test?
Not on a standard panel, since there is no THC or CBD in it. But an undisclosed blend means you cannot state with confidence what you consumed.
Can I take it with my medication?
Not without asking your doctor, and specifically not if you take an antidepressant. Kanna affects serotonin reuptake and kava affects the liver.
Can I drink alcohol with it?
No. Kava and alcohol together is the combination behind most of the liver-injury reports associated with kava.
How is it shipped in summer?
Cold-packed with an ice pack and insulated foil. Koi still warns it can soften in transit; refrigerate until firm if it arrives soft.
MyCannabisReviews may earn a commission from qualifying purchases made through links on this page, at no extra cost to you. We do not sell these products directly. Content is for adults 21+ and is informational only; it is not medical advice. Prices and specifications verified 28 August 2026 and change frequently.