If you’ve looked into microdosing for more than an hour, you’ve encountered James Fadiman’s name and Paul Stamets’s name, and probably heard that one of their protocols is “the best one to start with.” What you’ve probably encountered less often is a clear-eyed comparison of what each protocol actually involves, what it’s optimised for, and where each one tends to fall short
While our microdosing overview covers the evidence base, risks, and broader context, this article assumes you’ve done that reading and are now trying to decide how to actually structure a practice.
What Makes a Microdosing Protocol?
A microdosing protocol is a structured schedule — specific on-days, off-days, cycle length, and break periods — designed to produce consistent effects while managing tolerance and preserving your ability to accurately assess what’s working. Without that structure, tolerance accumulates quickly, self-assessment becomes unreliable, and the practice tends to drift toward either overuse or abandonment.
Classical psychedelics build pharmacological tolerance fast. Two to three consecutive days of use produces noticeably diminished effects. This is why every established protocol builds in mandatory off-days — not as arbitrary rules, but as the mechanism that keeps the practice functional. The protocol is the container.
The Fadiman Protocol: One Day On, Two Days Off
The Fadiman Protocol is the most widely used and most researched microdosing schedule. Developed by psychologist James Fadiman based on self-report data collected from hundreds of practitioners, it runs as follows: dose on Day 1, off on Days 2 and 3, dose again on Day 4, and repeat for four to eight weeks. After a full cycle, take at least a two week break before starting again.
The two off-days serve two distinct functions. The first is pharmacological: preventing tolerance from accumulating. The second is evaluative: the contrast between dose days and non-dose days is what makes genuine self-assessment possible. If you’re dosing too frequently, you lose the baseline comparison that tells you whether the practice is actually doing anything.
Best suited for: First-time practitioners. People who want a structured, well-documented protocol with the most accumulated community feedback. Anyone who prefers a clear schedule over intuitive dosing.
Where it tends to fall short: The three-day rhythm doesn’t align naturally with a standard work week — dose days rotate through the week rather than falling on fixed days. Some people find this disorienting to plan around.
The Stamets Stack: Four On, Three Off, With Additions
Developed by mycologist Paul Stamets, this protocol differs from Fadiman’s in two ways: the schedule and the substances involved.
The schedule runs four days on, three days off. The stack adds two supplements to the psilocybin dose: lion’s mane mushroom (Hericium erinaceus) and niacin (vitamin B3). The theoretical rationale is neuroplasticity enhancement — lion’s mane is proposed to stimulate nerve growth factor (NGF), and niacin is included for its theorised role in facilitating delivery of the other compounds to peripheral neurons.
That theory has not been tested in controlled trials. The specific three-way stack has no clinical research behind it. What does exist is substantial anecdotal enthusiasm and some evidence for lion’s mane’s effects on NGF in isolation, which is a different thing from the combined stack producing synergistic neuroplasticity effects.
Best suited for: People who want to combine psilocybin microdosing with broader cognitive and nervous system support. Those who are already using lion’s mane for other reasons. Practitioners who prefer a schedule that aligns more cleanly with a standard work week.
Where it tends to fall short: Four consecutive dose days brings a higher risk of tolerance accumulation than the Fadiman Protocol. The added supplements increase cost and complexity. If effects diminish toward Day 3 or 4, that’s tolerance — not a sign to increase the dose.
One important caution: niacin at the doses often discussed (100–500mg) causes a pronounced flushing response in most people — a temporary reddening and warming of the skin. This is harmless but can be alarming if unexpected. Start at the lower end.
The Every-Other-Day Protocol
Less common, less documented. This schedule alternates dose and rest days in a simple one-on, one-off pattern indefinitely.
The appeal is simplicity. The problem is that it carries a meaningfully higher risk of gradual tolerance accumulation than either of the two protocols above. The single off-day between doses is less pharmacological reset than it is a pause. Most practitioners who start with every-other-day dosing find effects diminishing within a few weeks.
Best suited for: Experienced practitioners who have completed multiple Fadiman or Stamets cycles and have a clear sense of their own response. Not recommended as a starting protocol.
Where it tends to fall short: Everywhere, for beginners. The tolerance risk is real, and the compressed schedule makes it hard to distinguish genuine effects from expectation.
Intuitive Dosing: No Fixed Schedule
Some experienced practitioners eventually transition away from fixed protocols toward dosing as needed — never on two consecutive days, and with extended breaks built in, but without a rigid schedule governing every week.
This approach requires a well-calibrated baseline, honest self-assessment, and a track record with structured protocols first. It is not a starting point. People who skip straight to intuitive dosing tend to either under-dose (producing no discernible effect) or gradually drift toward overuse as their sense of “need” expands.
Best suited for: Practitioners with multiple completed cycles behind them who have a clear, journalled understanding of their own response pattern.
Where it tends to fall short: Without structure, the feedback loop that makes self-assessment reliable breaks down. If you’re not keeping a journal, intuitive dosing is another name for inconsistent dosing.
How Do the Protocols Compare?
The Fadiman Protocol is the lowest-risk starting point. One dose day followed by two full off-days keeps tolerance well-managed, gives you a clean baseline for comparison, and has the most accumulated practitioner data behind it. The rotating schedule is its only real practical friction.
The Stamets Stack trades some of that tolerance management for a work-week-friendly schedule and the added supplements. Four consecutive dose days means effects will likely soften by Day 3 or 4 — that’s normal, not a reason to adjust the dose. The neuroplasticity rationale is plausible but unproven; approach the lion’s mane and niacin additions with interest rather than certainty.
Every-other-day is the simplest schedule and the least forgiving. The single rest day doesn’t give tolerance enough time to clear, and most practitioners find effects diminishing within a few weeks. Reserve it for after you have multiple structured cycles behind you.
The consistent variable across all three: a daily journal or meditation practice. Without at least one of these, you’re assessing by impression rather than data, and the subtle, cumulative nature of microdosing effects makes impression an unreliable guide.
Which Protocol Should You Start With?
For most people starting out, the Fadiman Protocol is the right choice. It has the most accumulated practitioner data, the clearest tolerance management, and a structure simple enough to maintain without friction. Its main limitation — the rotating schedule — is real but manageable with a calendar.
If you’ve already completed a Fadiman cycle and want to experiment with the stack, the Stamets Protocol is a reasonable next step — with realistic expectations about the evidence base for the added supplements.
Whatever protocol you use, keeping a daily journal or meditation practice is non-negotiable. Effects are often subtle and cumulative; without a written record or mindfulness practice, you’re relying on impression rather than data. The microdosing overview covers what good journaling looks like, and if you want a structured approach that walks through protocols, calibration, meditation, and integration together, Microdosing Mindfully is a course built for exactly that.
Frequently Asked Questions
Can I switch protocols mid-cycle? Better not to. Switching mid-cycle makes it harder to accurately assess what’s working and why. Complete a full cycle with one protocol, take a proper break, then try a different approach for the next cycle. Treat each cycle as an experiment with consistent conditions.
How long should the break be between cycles? Two to four weeks minimum. Some practitioners take longer — particularly after a Stamets cycle, where four consecutive dose days may warrant a longer reset. The break isn’t wasted time; it’s when you consolidate what the cycle showed you and let tolerance fully clear.
Do I need to use the same substance for a full cycle? Yes. Cross-tolerance exists between psilocybin, LSD, and mescaline — switching substances mid-cycle confounds your self-assessment and doesn’t meaningfully reset tolerance. Choose one substance and stay with it for the cycle.
What if I don’t notice any effects after two weeks? Two possibilities worth investigating: your dose may be too low, or SSRIs or other medications may be blunting your response. Before adjusting the dose, review the safety and contraindications guidance — particularly the section on SSRIs and receptor downregulation. If you’re not on any blunting medications and still noticing nothing after consistent journalling, a modest dose increase at the start of the next cycle is reasonable.
Is one protocol better for mental health goals versus productivity goals? There’s not enough evidence to make confident protocol-specific recommendations for different goals — the research is too preliminary and individual variation is too significant. What does seem consistent across the evidence is that mindset, lifestyle context, and integration practices matter more than protocol choice. The microdosing overview covers the evidence honestly, including what the research does and doesn’t show.