Three grades, three prices, and no assay behind any of them. Premium costs 2.6 times more per gram than Grade B on this site, and the justification is a potency claim that our own Grade B product page contradicts in writing. We'd rather explain the grading honestly than let the price ladder do the arguing, so this article audits our own labels alongside the science.
Amanita muscaria grades describe appearance — cap integrity, colour retention, wart preservation and cleanliness — not measured muscimol content. No published study has ever compared alkaloid levels between commercial grades. What has been measured is anatomy: Tsujikawa's 2006 GC-MS analysis found ibotenic acid and muscimol far lower in stems than caps, and more concentrated in cap flesh than in the cuticle. So cap share is evidence-linked to potency and grade is not. On this site Grade B runs €0.35–0.45 per gram and Premium €0.90–1.50, a gap of up to 2.6×.
If you only take one thing from this page: grade tells you what a batch looks like and how carefully it was handled, and those correlate with drying discipline. They are not a dose.
What Does Each Grade Actually Describe?
Physical condition. Across the trade, grading of dried Amanita muscaria caps turns on how intact the cap is, how well the red has held, whether the white warts survived drying, and how clean the material is of forest debris.
Our own Grade B page is unusually direct about the last part: it says the caps "may contain grass, leaves or sand". That's a real, checkable difference and a genuinely useful disclosure. It's also a statement about debris, not about chemistry.
Do the Grades Differ in Potency?
Nobody has measured it, and our own product copy can't agree on the answer. Here is what the three pages say, quoted:
- Grade A — "premium quality, high muscimol content".
- Grade B — "full potency at exceptional value. Slight cosmetic variation, same active compound level."
- Premium — "the highest potency grade, richer in active compounds than Grade A", and in the long description, "more potent than grade A. Also it contains more vitamins and minerals."
Read the second and third bullets together. Grade B's page says grade is cosmetic and the active level is the same. Premium's page says grade encodes potency. Both cannot be true, and neither is supported by an assay.
What Has Actually Been Measured?
Anatomy, and the numbers are striking. Tsujikawa's team analysed market Amanita mushrooms by gas chromatography–mass spectrometry and found both active compounds concentrated in the flesh of the cap rather than the cuticle, with stem contents far lower than cap contents.
The within-species spread was also enormous. Across five Amanita muscaria caps, ibotenic acid ranged from under 10 to 2,845 ppm and muscimol from 46 to 1,052 ppm — a 20-fold spread in muscimol between samples of the same species.
That range dwarfs any difference anyone claims between grades. Which means the honest reading is that batch variation swamps grade, and our potency factors article lists what actually drives it: drying temperature, origin, season and storage.
So What Are You Paying For?
Presentation, cleanliness, and indirect evidence of careful handling. A batch that dried into intact, brightly coloured caps was probably dried attentively, and attentive drying is what converts ibotenic acid to muscimol. That's a real correlation. It's just not a measurement.
Here's the price ladder on this site, per gram:
| Grade | Cheapest per gram | Smallest pack per gram | What the page claims |
|---|---|---|---|
| Grade B | €0.35 (1 kg €349) | €0.45 (200 g €89) | Same active level, cosmetic difference only |
| Grade A | €0.50 (1 kg €499) | €1.10 (50 g €55) | "High muscimol content" |
| Premium | €0.90 (1 kg €899) | €1.50 (50 g €75) | Richer in active compounds than Grade A |
At the kilo tier Premium is 2.58× Grade B. At the small-pack tier the gap is 2.67×. That's the cost of the claim our Grade B page denies.
Why Every Grade Change Needs Recalibration Anyway
Because if grade doesn't encode potency, switching grades is exactly like switching batches — and a new batch is the one situation where everyone already agrees you start low.
The trap is thinking a downgrade is automatically weaker. It might be stronger. Grade B caps with debris could still sit at the top of the muscimol range, and a beautiful Premium cap could sit at the bottom. Neither has been assayed, so the appearance gives you no direction to adjust in.
Treat every grade change as a fresh calibration from a low dose, the same rule our safety checklist applies to new batches.
What Would Make Grading Meaningful?
A certificate of analysis reporting muscimol and ibotenic acid per gram for the specific batch. That's the document that would replace all of this guesswork with a number, and our COA guide explains how to read one.
Nobody in this trade currently publishes per-batch alkaloid assays as standard, us included. Until that changes, grading is a cosmetic specification with a price attached, and the useful skill is judging the material yourself — which our quality checking article covers.
Which Grade Should You Buy?
- If you want the most material for the money, buy Grade B. Its own page says the active level is the same, and it's the cheapest per gram by a wide margin.
- If you want caps you can inspect and identify confidently, buy Grade A or Premium. Intact, clean, well-coloured caps let you verify what you have — worth real money for a mushroom with dangerous lookalikes.
- If you're buying to grind into powder, the cosmetic premium buys you nothing. You're destroying the attribute you paid for.
- Don't buy Premium expecting a bigger effect per gram. No assay supports it, and our own catalogue argues against it in two places out of three.
- Whichever you pick, stay with it. Consistency of source matters more than grade, because it's the only way a personal dose log means anything.
A Note on Debris, and Why It Isn't Trivial
Grass and leaves are cosmetic. Sand is not entirely — grit is abrasive, it adds weight you're paying for, and it signals ground-contact handling. If you buy Grade B, expect to sort it, and weigh after sorting rather than before.
That's a small practical point with a real dosing consequence: debris inflates your gram measurement, so an unsorted gram of Grade B is less mushroom than a gram of Premium. Not weaker material — less of it.
Frequently Asked Questions
Is Premium Amanita muscaria stronger than Grade A?
No study has compared them. Our Premium page claims it is, our Grade B page says grade reflects cosmetic variation with the same active level, and no published analysis has measured muscimol across commercial grades. Treat the claim as unverified.
What is the difference between Grade A and Grade B?
Appearance and cleanliness. Grade A caps are more intact, better coloured and cleaner; Grade B may contain grass, leaves or sand. Grade B costs €0.35–0.45 per gram against Grade A's €0.50–1.10, and its own page states the active compound level is the same.
Does grade tell you how much muscimol you're getting?
No. The only measured predictors are anatomical: Tsujikawa found both compounds far lower in stems than caps and richer in cap flesh than cuticle, with muscimol spanning 46 to 1,052 ppm across five muscaria samples. Grade reports none of that.
Should I change my dose when I switch grades?
Recalibrate from a low dose, yes — but not in a predictable direction. Since grade doesn't encode potency, a new grade is just a new batch, and batch variation in the published data reached 20-fold on muscimol within one species.
Which grade is best for microdosing?
Grade B on cost, Grade A or Premium on inspectability. If you weigh carefully and sort debris out first, the cheaper grade gives you more mushroom per euro with no evidence of a weaker effect.
Shop Amanita muscaria by Grade
Grade B (200 g €89, 400 g €159, 600 g €239, 1 kg €349) is the best value per gram and, by its own description, the same active level. Grade A (50 g €55, 100 g €79, 300 g €225, 1 kg €499) gives cleaner, more intact caps that are easier to verify. Premium (50 g €75, 100 g €119, 1 kg €899) is the presentation tier. Capsules (120 caps €55) sidestep grading and weighing entirely. Free shipping on orders over €50.
Related Articles
- How to Check Amanita muscaria Quality
- Amanita muscaria Potency Factors
- How to Read a Certificate of Analysis
- Amanita muscaria Safety Checklist
- Ibotenic Acid vs Muscimol
- How to Store Dried Amanita muscaria
- Amanita muscaria Side Effects and Interactions
Sources
- Tsujikawa K, Mohri H, Kuwayama K, et al. Analysis of hallucinogenic constituents in Amanita mushrooms circulated in Japan. Forensic Sci Int. 2006;164(2-3):172-178. PubMed 16464551
- Michelot D, Melendez-Howell LM. Amanita muscaria: chemistry, biology, toxicology, and ethnomycology. Mycol Res. 2003;107(2):131-146. PubMed 12747324
- Feeney K, Kababick J, Wise S. An examination of cholinergic symptoms produced by the fly agaric mushroom Amanita muscaria (Agaricomycetes): revisiting the role of muscarine. Int J Med Mushrooms. 2025;27(7):1-15. PubMed 40228215