AW Naturals Review: They Name the Mycelium-on-Grain Problem, Which Most Brands Will Not
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Guides12 min readAugust 11, 2026

AW Naturals Review: They Name the Mycelium-on-Grain Problem, Which Most Brands Will Not

AW Naturals sells a mushroom and adaptogen coffee alternative with about 45mg of caffeine from cacao, free shipping on subscriptions and a 30-day guarantee. It names the mycelium-on-grain problem directly, which is unusual.

By Med Consumer Watch Team
AW Naturals makes "Not Coffee" — a mushroom and adaptogen blend positioned as a coffee alternative, with Morning Mush as its lead product, marketed for energy, focus and mental clarity. Verified from its own pages: 4.8 stars from 758 reviews, 2,000+ members, free USA shipping on all subscriptions, a 30-day guarantee, and globally sourced ingredients. Morning Mush contains about 45 mg of naturally occurring caffeine from cacao, against 100+ mg in a typical cup of coffee. And this, from the company's own FAQ, is the reason to take the brand seriously: > "Many other brands that say they use Lions Mane, Reishi, Chaga, and Cordyceps are often not using the part of the mushroom with the actual good ingredients! Myceliated grains is the equivalent of the soil in a mushroom grow and the fruiting body is the actual mushroom." That is accurate, it is the biggest quality problem in the mushroom supplement category, and most brands have a commercial interest in not mentioning it. This review contains affiliate links and we may earn a commission if you buy through them. The assessment is our own. Site details verified August 12, 2026. Informational only — not medical advice.

Mycelium on grain: why naming it matters

The company's own description is correct, and here is the full picture. What a mushroom is. The fruiting body is the mushroom you would recognise — the reproductive structure, and where the compounds people take these supplements for are concentrated. Mycelium is the underground network the organism grows from. Same organism, different material, very different composition. How much of the category is actually made. Growing fruiting bodies takes time, space and expertise. Growing mycelium is faster and far cheaper: you inoculate sterilised grain — usually rice or oats — let the mycelium colonise it, then dry and grind the whole thing, grain included. The resulting powder is substantially grain. AW Naturals' analogy is a good one: myceliated grain is closer to the growing medium than to the mushroom. A label reading 1,000 mg of lion's mane may be describing a mostly-starch powder. The measurable marker is beta-glucans. These are the polysaccharides most associated with the effects people take mushrooms for, and they are far more concentrated in fruiting bodies. And here is the trick to watch for: many products report "polysaccharides", not beta-glucans. Total polysaccharide content includes the starch contributed by grain, so a high polysaccharide number can be evidence of dilution rather than potency. That single substitution is how the category obscures the problem. So the two questions for any mushroom product, including this one: Fruiting body or mycelium — and if mycelium, grown on what? What is the beta-glucan percentage — not the polysaccharide percentage? AW Naturals answers the first question clearly and in the customer's favour. Ask it the second. A brand that has built its positioning on this distinction should be able to state beta-glucan content, and it is the number that would prove the claim rather than assert it. Extraction matters too. Mushroom cell walls are chitin, which humans digest poorly, so raw powdered mushroom is poorly bioavailable. Hot-water extraction breaks the chitin down and concentrates water-soluble beta-glucans; dual extraction adds an alcohol step to capture the triterpenes that matter for reishi and chaga specifically. Ask whether the mushrooms are extracted or simply powdered — it is a meaningful difference and it is rarely stated.
  • Question | Good answer | Warning sign
  • Fruiting body or mycelium? | 100% fruiting body | Myceliated grain / mycelial biomass
  • Beta-glucan percentage? | A stated number | "Polysaccharides" quoted instead
  • Extracted or powdered? | Hot water, or dual extraction for reishi and chaga | Raw powder - poorly bioavailable
  • Third-party tested? | Batch-matched certificate | "Tested" with no document
  • Heavy metals screened? | Yes - mushrooms accumulate them | Not mentioned

Ask for beta-glucan percentage rather than total polysaccharides. Polysaccharide figures include starch from the grain that mycelium is grown on, so a high number can indicate dilution rather than potency - and that substitution is the main way the mushroom supplement category hides what is in the tub.

What the ingredients actually do

The honest evidence position on each component, since the blend is the product. The caffeine reduction is the best-evidenced benefit and it is not the one being led on. About 45 mg from cacao against 100+ mg in coffee is a genuine, meaningful dose reduction — and for someone whose coffee habit is producing jitteriness, anxiety, afternoon crashes or disrupted sleep, reducing the dose is one of the more effective changes available. Caffeine's half-life is five to six hours, so an afternoon coffee is measurably present at bedtime. If you switch, taper first. Caffeine withdrawal is real and well characterised — headache, fatigue, irritability, starting 12 to 24 hours after the last dose, peaking at one to two days and resolving within about a week. Halve your coffee for a week before switching, or you will blame the product for how you feel. The mushrooms: Lion's mane has the most human data of the group for cognition — several small trials show modest improvement, and the nerve growth factor mechanism is genuinely interesting. The trials are small, short and heterogeneous in preparation and dose. Reasonable to try; not established. Reishi — long traditional use for sleep and calm; limited and mixed human trial evidence. Note it has antiplatelet activity, which matters if you take anticoagulants. Cordyceps — small, mixed trials on exercise performance; the better-conducted ones show little. Chaga — largely preclinical. And a specific caution: chaga is high in oxalates, with case reports linking heavy long-term use to kidney injury. Avoid it if you have kidney disease or a history of kidney stones. "Adaptogens", which is the other half of the positioning. The term describes herbs proposed to help the body resist stressors. It is not a regulatory or pharmacological category with an agreed definition — it is a framework from Soviet-era research that has been adopted commercially. Ashwagandha is the most commonly used and has the most support — reasonable short-term evidence for stress and anxiety measures. It has also been associated with rare cases of liver injury, should be avoided in pregnancy, and used cautiously with thyroid medication and sedatives. Rhodiola has modest evidence for fatigue. Most others are traditional-use claims rather than trial-supported ones. And the general safety points: mushroom and adaptogen supplements can interact with anticoagulants, antiplatelets, immunosuppressants and diabetes medication; immune-modulating supplements and autoimmune conditions or transplant medication are a poor combination; and data in pregnancy and breastfeeding is simply absentavoid. None of this is FDA-approved to treat anything, and the company's own claims carry the standard asterisk.

Talk to your prescriber before taking mushroom or adaptogen blends if you take anticoagulants, antiplatelets, immunosuppressants or diabetes medication, or if you have an autoimmune condition. Avoid chaga with kidney disease or a history of kidney stones due to its oxalate content, and avoid ashwagandha in pregnancy - it has also been associated with rare liver injury.

Value, terms and how to decide

The commercial terms are reasonable: free USA shipping on all subscriptions, a 30-day guarantee, a rewards programme, and 4.8 stars across 758 reviews with 2,000+ members stated. The 30-day guarantee is the right length for this product, because taste is the deciding factor and it is divisive. Mushroom and cacao blends do not taste like coffee and are not trying to — some people find them genuinely enjoyable and some never get on with them. A guarantee that lets you find out is what makes trying it low-risk. Confirm whether it requires returning the product and who pays return shipping. On the subscription. Free shipping only on subscriptions is a common structure and it is worth noting: the one-off price is effectively higher. The usual checks apply — confirm you can pause and cancel from the account page, note the renewal date, and match the interval to your actual consumption, which for a daily morning drink is easy to estimate: count the servings and divide. How to decide whether it is for you: If you drink one coffee a day and sleep fine, this will not transform anything. The caffeine reduction is the real benefit and you do not have a caffeine problem. If you drink several, sleep badly and feel wired or anxious, reducing the dose is likely one of the more effective changes you could make — and a warm morning ritual is a far more sustainable way to do that than willpower. If a specific mushroom is your reason for buying, buy a single-species fruiting-body extract instead, at a stated dose with a stated beta-glucan percentage. A blend spreads a fixed serving across several ingredients, and the doses used in the lion's mane trials are generally higher than a multi-ingredient scoop can accommodate. And the framing worth carrying away: a lot of what a morning coffee does for people is the ritual — the warm cup, the pause, the marker between waking and starting. A product that preserves the ritual while cutting the dose is doing something real that a caffeine pill or plain abstinence cannot. That is a legitimate reason to buy it, and it is a better reason than the mushrooms. The free things that do more for energy than any blend: a consistent wake time seven days a week, daylight in the first hour after waking, treating sleep apnoea if you have it, and getting bloods checked — anaemia, thyroid disease, diabetes and B12 or vitamin D deficiency are common, testable causes of fatigue that no drink addresses.

Taper your coffee by half for a week before switching to any low-caffeine alternative. Withdrawal headache and fatigue peak one to two days after cutting caffeine and resolve within about a week - and people who switch abruptly blame the replacement product for how they feel.

Frequently asked questions

What is AW Naturals Not Coffee? A mushroom and adaptogen blend positioned as a coffee alternative, marketed for energy, focus and mental clarity, with Morning Mush as the lead product. How much caffeine does it contain? About 45 mg of naturally occurring caffeine from cacao, against 100+ mg in a typical cup of coffee. What is the mycelium-on-grain problem? Mycelium is commonly grown on rice or oats and the whole mass is dried and ground, so the powder is substantially grain. The fruiting body is the mushroom and where the relevant compounds concentrate. AW Naturals names this directly, which is unusual. How do I check a mushroom product's potency? Ask for beta-glucan percentage rather than total polysaccharides — polysaccharide figures include grain starch. Also ask whether the mushrooms are extracted or just powdered. Does lion's mane improve focus? Small human trials show modest cognitive improvement and the mechanism is interesting, but the evidence is early and it is not approved to treat anything. What are adaptogens? Herbs proposed to help the body resist stressors. It is a commercial framework rather than a defined pharmacological category. Ashwagandha has the most support, with reasonable short-term evidence for stress measures. Will I get caffeine withdrawal switching from coffee? Possibly — headache, fatigue and irritability starting 12 to 24 hours after your last dose and peaking at one to two days. Taper first. What are the shipping and guarantee terms? Free USA shipping on all subscriptions and a 30-day guarantee. Confirm whether returns are required and who pays shipping. Who should avoid these ingredients? Anyone taking anticoagulants, antiplatelets, immunosuppressants or diabetes medication without medical advice; avoid chaga with kidney disease or stones, and ashwagandha in pregnancy. Data in pregnancy and breastfeeding is absent for most of these. Is it worth it? If your coffee intake is costing you sleep or making you anxious, the dose reduction is genuinely useful and the ritual makes it sustainable. If a specific mushroom is your goal, buy a single-species fruiting-body extract instead.

The Bottom Line

Our rating: 7.5 / 10. A better-informed brand than most in its category, selling a product whose real benefit is not the one it leads with. Credit where it is clearly due. AW Naturals names the mycelium-on-grain problem directly and accurately — that mycelium grown on rice or oats produces a powder that is substantially grain, and that the fruiting body is where the compounds concentrate. That is the single biggest quality problem in mushroom supplements, and most brands have a commercial interest in never mentioning it. A company that leads with the awkward fact is generally worth more attention than one that does not. Ask it the follow-up question, though: what is the beta-glucan percentage? That is the number that proves the fruiting-body claim rather than asserting it, and the tell to watch for across the whole category is a product quoting "polysaccharides" instead — because that figure includes the grain starch. Also ask whether the mushrooms are extracted or simply powdered, since chitin cell walls make raw mushroom powder poorly bioavailable. On what the product actually does: the caffeine reduction is the well-evidenced part. About 45 mg against 100+ mg in coffee is a real dose reduction, and for anyone whose coffee habit is producing jitteriness, anxiety or poor sleep, cutting the dose is one of the more effective changes available. Taper your coffee first, or withdrawal will get blamed on the product. The mushroom and adaptogen evidence is thinner than the marketing. Lion's mane is modest and mixed; chaga and most adaptogens are largely preclinical or traditional-use. If a specific mushroom is your goal, a single-species fruiting-body extract at a stated dose beats a blend, because a fixed scoop spread across several ingredients cannot reach trial doses. Check interactions if you take anticoagulants, immunosuppressants or diabetes medication, and avoid chaga with kidney concerns. Check AW Naturals' range and 30-day guarantee Informational only, not medical advice. Site details verified August 12, 2026 and subject to change. Mushroom and adaptogen supplements are not FDA-approved to diagnose, treat, cure or prevent any disease. They may interact with anticoagulants, antiplatelets, immunosuppressants and diabetes medication - consult a clinician. Chaga is high in oxalates and has been linked in case reports to kidney injury with heavy use; ashwagandha has been associated with rare liver injury and should be avoided in pregnancy. Data in pregnancy and breastfeeding is absent for most of these ingredients.

Medical Disclaimer

This article is for informational purposes only and is not intended as medical advice. Always consult with a qualified healthcare provider before making decisions about your health or medications. Individual experiences may vary.

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