Best Lion's Mane Supplement: A Buying Guide

The best lion's mane supplement is the one you can actually verify: whole fruiting body, dual extracted, third-party lab tested, and dosed high enough to matter. Many products miss at least one of those. Here is how to tell the real thing from the noise, and where Forgotten stands on each standard, with the lab work published so you can check it.

Look for whole fruiting body: the fruiting body concentrates many of the most-studied compounds, and mycelium adds others. A lot of cheaper products are mycelium grown on grain, which dilutes the active content with leftover starch and lets a brand print "lion's mane" on a bottle that holds very little of it.

Every Forgotten product is fruiting body and mycelium extract, never mycelium-on-grain filler.

A label can say "lion's mane" and deliver a token amount. The first thing to check when you are deciding how much lion's mane to take day to day is a stated active dose per serving, and ideally third-party verification of that number. The common standard sits around 250mg.

Forgotten delivers 777mg per dose: 500mg fruiting body extract and 277mg mycelium extract, close to three times the common 250mg standard.

Lion's mane holds different families of compounds: water-soluble beta-glucans, and alcohol-soluble compounds including the hericenones and erinacines it is known for. Water alone leaves the alcohol-soluble ones behind. Alcohol alone leaves the beta-glucans behind. Dual extraction uses both, so you get the full range of the mushroom, not half of it.

Forgotten is dual extracted for exactly this reason. Hericenones and erinacines are studied for how they support the body's production of nerve growth factor†, and dual extraction helps capture the full range of the mushroom's chemistry.

Potency on the label only matters if the compounds are absorbed. That is bioavailability, how much of what you take is actually taken up rather than passing through, and it is worth asking any brand how their format supports it.

Forgotten tinctures and gummies use liposomal delivery, combining the actives with a phospholipid complex to support stability and absorption†.

The strongest sign a brand is telling the truth is third-party testing you can actually see. Look for published certificates of analysis with named test methods, not a vague "lab tested" badge with nothing behind it.

Forgotten is third-party tested by the Megazyme enzymatic assay for beta-glucans, with a published certificate of analysis for every batch, so the potency on the label is verified, not just asserted. Open the COA link on any product page for the latest test results.

The quiet tell of a serious brand is a short, honest supply chain: grown and made in one place, by people who put their name on it and publish the results.

Forgotten tests every batch, publishes the results, and stands behind each one.

Every standard above is one you can check, so do not take it on faith from anyone, us included. Ask any brand for a current, per-batch certificate of analysis with the test method named. If they can show it, good; if they cannot, that tells you something. A high milligram number on the front of the box tells you nothing on its own, and a "whole fruiting body" claim is only as good as the COA behind it.

Here is how to run that test on Forgotten: read our current batch COA, check the batch number on your bottle against it, and see the beta-glucan number measured by the Megazyme assay. If we ever cannot show you that, hold us to the same standard as everyone else.

What is the best lion's mane supplement?

The best lion's mane supplement is whole fruiting body (fruiting body and mycelium), dual extracted, third-party lab tested, and dosed high enough to matter.

By those standards, Forgotten delivers 777mg per dose, dual extracted and third-party tested by the Megazyme enzymatic assay for beta-glucans.

What is the best lion's mane brand?

The best lion's mane brand is the one that lets you verify every claim: whole fruiting body (fruiting body and mycelium), dual extracted, third-party lab tested, and dosed high enough to matter.

The same standards define a good functional mushroom brand generally. By them, Forgotten publishes its testing and delivers 777mg per dose.

Fruiting body or mycelium, which is better?

Look for both. The fruiting body concentrates many of the most-studied compounds, and mycelium adds others. Using the two together is what Forgotten does.

What is a good lion's mane dosage?

Many products land around 250mg per serving. Forgotten delivers 777mg per dose: 500mg fruiting body extract and 277mg mycelium extract.

Is lion's mane a psychedelic?

No. Lion's mane is a functional mushroom with no psilocybin and no perception-altering effect. It supports focus†, not a trip.

How long until I notice anything?

Many people notice a subtle shift in the first week and a clearer difference by around the first month. It keeps deepening the longer you stay with it.


Medically reviewed by Alexander Paziotopoulos, MD, FAARFM, Founder of The Pazio Institute and The Institute for Medical Maintenance Engineering. He reviews our products independently, without pay or incentive.

Docherty S, Doughty FL, Smith EF. The Acute and Chronic Effects of Lion's Mane Mushroom Supplementation on Cognitive Function, Stress and Mood in Young Adults: A Double-Blind, Parallel Groups, Pilot Study. Nutrients. 2023;15(22):4842. Acute finding: quicker performance on the Stroop task 60 minutes after a single dose. pmc.ncbi.nlm.nih.gov/articles/PMC10675414

Docherty S, Doughty FL, Smith EF. Nutrients. 2023;15(22):4842. Chronic finding: a trend toward reduced subjective stress after 28 days. pmc.ncbi.nlm.nih.gov/articles/PMC10675414

Mori K, Inatomi S, Ouchi K, Azumi Y, Tuchida T. Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytother Res. 2009;23(3):367-372. Adults aged 50 to 80 with mild cognitive impairment, 16-week intervention. "Improvement" defined as a 2-point or greater increase on the Revised Hasegawa Dementia Scale (HDS-R). 10 participants (71%) were notably improved (more than 3 points); 3 (21%) were improved (2 points); 1 unchanged. These results reflect the published trial population and are not a claim about Forgotten Mushrooms products specifically. pubmed.ncbi.nlm.nih.gov/18844328

Wong KH, Naidu M, David P, et al. Peripheral Nerve Regeneration Following Crush Injury to Rat Peroneal Nerve by Aqueous Extract of Medicinal Mushroom Hericium erinaceus. Evid Based Complement Alternat Med. 2011. For erinacines and NGF: Kawagishi H, Zhuang C. Hericenones and erinacines: stimulators of nerve growth factor biosynthesis in Hericium erinaceus. ncbi.nlm.nih.gov/pmc/articles/PMC3176599