Microdosing Protocols Fadiman Stamets: Full Comparison Guide

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Microdosing involves substances that may be restricted in your jurisdiction. Consult a qualified healthcare professional before starting any protocol, especially if you take medication. Azarius does not encourage illegal activity.

18+ only — This guide covers microdosing schedules for adults. Dosing ranges and physiological effects described below apply to adult bodies; the practice is not appropriate for anyone under 18.

A microdosing protocol is a structured schedule that dictates when you dose and when you rest, designed to produce sub-perceptual cognitive shifts without building tolerance. The microdosing protocols Fadiman Stamets practitioners follow most often are the Fadiman protocol (one day on, two days off) and the Stamets Stack (five days on, two days off, often combined with lion's mane and niacin). According to a qualitative study of 196 microdosers, 38% followed the Fadiman schedule and the Stamets approach was the second most commonly reported (Petranker et al., 2022). Both aim to keep you below the threshold of perceptible alteration, but they differ meaningfully in rhythm, rationale, and what you pair with the dose.

What the Fadiman Protocol Looks Like in Practice

The Fadiman protocol is a one-day-on, two-days-off rhythm that makes it the simplest microdosing schedule to maintain. Dr James Fadiman laid out this schedule in The Psychedelic Explorer's Guide (Fadiman, 2011), and it has since become the default starting point for most first-time microdosers. The logic is straightforward: dose on Day 1, observe any residual effects on Day 2 (your "transition day"), then use Day 3 as a true baseline — no substance, no afterglow, just your unaltered self for comparison. Then you repeat.

AZARIUS · What the Fadiman Protocol Looks Like in Practice

That Day 3 baseline is the part people skip over, and it's arguably the most valuable day. Without it, you lose the ability to tell what the microdose is actually doing versus what you're expecting it to do. A 2022 self-blinding study published in eLife found that participants who believed they had taken psilocybin reported improved well-being regardless of whether they had actually received the active dose or a placebo (Szigeti et al., 2022). The Fadiman protocol's built-in off-days help you run your own rough comparison — though they don't eliminate expectation bias entirely. Nothing short of a proper double-blind does that.

A typical Fadiman cycle runs four to eight weeks. After that, Fadiman recommends a break of at least two weeks — partly to reset tolerance, partly to evaluate whether the changes you noticed persist without the substance. If they do, that tells you something interesting about habit formation. If they don't, that tells you something too. Many people who follow this protocol buy psilocybin truffles specifically because their consistent potency makes the low-dose calibration easier to manage across a full cycle.

What the Stamets Stack Looks Like in Practice

The Stamets Stack combines psilocybin, lion's mane, and niacin across five consecutive dosing days followed by two rest days. Paul Stamets — mycologist, author, and probably the most recognisable mushroom advocate alive — proposed this approach, and he specifically recommends combining the psilocybin microdose with lion's mane mushroom extract and a flush-dose of niacin (vitamin B3).

AZARIUS · What the Stamets Stack Looks Like in Practice

The reasoning behind each component, as Stamets has described it in interviews and his 2019 patent application: psilocybin stimulates neurogenesis and neuroplasticity via 5-HT2A receptor agonism; lion's mane contains hericenones and erinacines that may support nerve growth factor (NGF) production — a 2009 placebo-controlled trial found that 3 g/day of lion's mane improved cognitive function in older adults with mild cognitive impairment over 16 weeks (Mori et al., 2009); and niacin causes peripheral vasodilation (that's the flush — the red, tingly skin), which Stamets hypothesises pushes the neuroactive compounds further into the peripheral nervous system.

That last claim about niacin is speculative. There's no published clinical data showing that niacin-induced vasodilation meaningfully alters the distribution of psilocin or NGF-related compounds in neural tissue. It's a hypothesis, not an established mechanism. The lion's mane research is more solid but still limited — most studies use doses and preparations that don't map neatly onto what you'd take in a microdosing stack. If you want to order lion's mane separately to try it as a standalone nootropic before committing to the full stack, that's a perfectly reasonable approach.

Five days on is more aggressive than Fadiman's approach, and some people report building noticeable tolerance by days four and five. If the dose starts feeling like nothing by mid-week, that's your 5-HT2A receptors downregulating — exactly what the two-day break is meant to counteract.

Dose Ranges: What the Research Actually Used

Published microdosing studies typically report psilocybin doses in the range of 0.05–0.3 g of dried mushrooms, with most respondents clustering around 0.1–0.15 g. Both the microdosing protocols Fadiman Stamets advocates describe use the same ballpark dose. For dried psilocybin mushrooms, survey data and observational studies confirm this range (Hutten et al., 2019). Fresh psilocybin truffles contain roughly 65–70% water by weight, so equivalent truffle doses are correspondingly higher — typically around 0.5–1.0 g fresh weight, though potency varies by species and batch.

AZARIUS · Dose Ranges: What the Research Actually Used

The defining feature of a microdose is that it's sub-perceptual: you shouldn't feel altered. If you notice visual changes, body-load, or a distinctly different headspace, you've overshot. Drop the dose next time. A controlled laboratory study by Bershad et al. (2019) found that 0.5 mg of LSD (roughly equivalent to 5 µg — a common LSD microdose) produced no significant subjective effects compared to placebo, while 13 µg and above began to produce detectable changes in mood and perception. The principle translates: stay below the perceptual threshold.

Choosing Between the Two

The right protocol depends on your goals, your temperament, and how much structure you want in your self-tracking — no controlled trial has directly compared these protocols head-to-head, so the choice is personal rather than evidence-based.

The Fadiman protocol suits people who want clear on/off contrast. Those two rest days give you a built-in control condition. If you're the type who keeps a journal and likes to compare how you feel on dose days versus baseline days, Fadiman's structure makes that easy. It's also the more conservative option — fewer total doses per month means less cumulative exposure and a lower risk of tolerance creep.

The Stamets Stack suits people who are interested in the neuroplasticity angle and are comfortable with a more experimental approach. The lion's mane and niacin additions make it feel like a more "complete" protocol, though the evidence for the stack as a combined unit is still largely anecdotal. If you already take lion's mane as a standalone supplement, folding it into a microdosing schedule isn't a big leap.

Over the course of a four-week cycle, the Fadiman protocol gives you roughly 9–10 dose days. The Stamets protocol gives you roughly 20. That's a meaningful difference in total psilocybin exposure, and it's worth factoring in when you decide how long to run each cycle and how long to take off between them.

Journalling and Tracking

Consistent daily journalling is the single most useful tool for evaluating whether a microdosing protocol is working for you. Both Fadiman and Stamets emphasise the importance of recording your experience. Fadiman specifically asks his research participants to rate their day on several dimensions: productivity, mood, energy, social ease, physical symptoms. You don't need a fancy app — a notebook works. The point is to create a record you can look back on after four to eight weeks and evaluate honestly.

Rate each day on a simple 1–5 scale for three or four categories that matter to you. Do this on dose days, transition days, and off days. After a full cycle, look at the averages. If dose days and off days score roughly the same, the microdose may not be doing what you think it's doing — or the benefits may have become your new baseline, which is a different and more interesting outcome.

Common Mistakes

Dosing too high is the single most common microdosing error — sub-perceptual means sub-perceptual, and if you feel something, lower the dose. The second most common error is not taking breaks between cycles. Running either protocol indefinitely without a multi-week reset defeats the purpose of the rest days within the cycle. Tolerance to serotonergic psychedelics builds quickly — 5-HT2A receptor density measurably decreases after just a few doses (Buckholtz et al., 1990) — and while the short breaks within each protocol help, they don't fully substitute for a proper off-cycle.

Third: combining microdoses with SSRIs, MAOIs, lithium, or other serotonergic medications without understanding the interaction risks. Psilocybin acts on the same receptor systems as these drugs. The dedicated interactions article in this wiki covers the specifics — read it before starting any protocol if you take psychiatric medication.

What You Need to Get Started

Starting a microdosing protocol requires a reliable source material, a precision scale, and a journal. For the Fadiman protocol, you need only your chosen substance — most people buy psilocybin truffles for their legal availability and batch-to-batch consistency. For the Stamets Stack, you also need lion's mane extract and flush-form niacin. A milligram-precise scale (0.001 g resolution) is non-negotiable: eyeballing doses at this range is unreliable and defeats the purpose of a structured protocol. You can get a suitable precision scale from most smart shop suppliers. Azarius carries both psilocybin truffles and lion's mane supplements, which makes assembling a Stamets Stack straightforward if you order both together.

European Context and Legal Field

Psilocybin truffles occupy a unique legal position in the Netherlands, where they remain available for purchase in smart shops while psilocybin mushrooms are prohibited. According to the EMCDDA (European Monitoring Centre for Drugs and Drug Addiction), psilocybin remains a controlled substance in most EU member states, and the legal status of truffles specifically varies by country. If you're outside the Netherlands, check your local regulations before attempting to order any psilocybin-containing product. The Beckley Foundation has published several policy briefs advocating for expanded psychedelic research access across Europe, and their work has influenced the regulatory conversation — but policy change is slow, and current law is what matters for your purchasing decisions.

This legal patchwork is one reason the microdosing protocols Fadiman and Stamets described have spread primarily through self-report communities rather than clinical infrastructure. Researchers face significant regulatory barriers to running controlled microdosing trials, which is why so much of the evidence base still comes from surveys and self-blinding studies rather than gold-standard RCTs.

The Placebo Question

Expectation effects account for a significant portion of reported microdosing benefits, based on the best available evidence. The Szigeti et al. (2022) self-blinding study mentioned earlier is the largest of its kind: 191 participants who set up their own placebo-controlled experiment at home. The result — that belief in having taken a microdose predicted well-being improvements more strongly than whether the capsule actually contained psilocybin — doesn't mean microdosing "doesn't work." It means the effect is difficult to separate from expectation at these doses, at least with current measurement tools.

A more recent laboratory study by de Wit et al. (2022) using controlled low doses of psilocybin did find subtle but measurable changes in emotional processing and brain connectivity at sub-perceptual doses, suggesting there is a pharmacological signal beneath the noise of expectation. The field is still sorting this out. Following a structured protocol with built-in off-days and honest journalling is the best tool you have for running your own informal assessment.

Limitations of Current Microdosing Evidence

No randomised controlled trial has directly compared the Fadiman protocol against the Stamets Stack in a clinical setting. The vast majority of what we know about both microdosing protocols Fadiman Stamets advocates recommend comes from survey data, self-report studies, and a handful of small laboratory experiments. This is worth being honest about: we are working with suggestive evidence, not proof.

Survey studies suffer from self-selection bias — people who microdose and then fill out a questionnaire are disproportionately likely to be people who had a positive experience. The self-blinding methodology used by Szigeti et al. (2022) was a clever workaround, but it still relied on participants to set up their own capsules correctly and report honestly. Laboratory studies control for more variables but typically use single doses rather than the multi-week protocols people actually follow. Until someone funds a proper multi-arm RCT comparing Fadiman, Stamets, and placebo over a full cycle, we're all making educated guesses. That's not a reason to avoid microdosing — it's a reason to track your own data carefully and hold your conclusions loosely.

How Fadiman and Stamets Protocols Compare to Intuitive Dosing

Roughly 20–25% of microdosers in survey studies report following no fixed schedule at all, instead dosing "as needed" or "intuitively" (Petranker et al., 2022). Intuitive dosing means taking a microdose whenever you feel you'd benefit from one — before a creative project, on a difficult workday, or simply when the mood strikes. It has the advantage of flexibility and the disadvantage of making self-assessment nearly impossible.

The structured microdosing protocols Fadiman Stamets practitioners use exist specifically to counteract the problems with intuitive dosing. Fixed schedules create predictable data points: you know which days you dosed and which you didn't, so you can compare. Intuitive dosing collapses that distinction. You also lose tolerance management — if you dose three days in a row because you "felt like it," you've already started downregulating your 5-HT2A receptors without the built-in recovery period that both Fadiman and Stamets protocols provide.

That said, some experienced microdosers transition to intuitive dosing after completing several structured cycles, using the self-knowledge they built during those cycles to guide their timing. If you're just starting out, pick a protocol. You can always loosen the structure later once you know what your baseline actually feels like.

Last updated: April 2026