Spend ten minutes researching how to microdose psilocybin and you’ll run into the name James Fadiman.
His protocol, refined over two decades of survey data from thousands of microdosers, is the framework most people use. One day on, two days off, for four to six weeks, then pause.
That’s the schedule. It isn’t the whole picture. Knowing the schedule doesn’t tell you what dose to start at. It doesn’t tell you what to expect across the first month or how to know if it’s working. It doesn’t tell you why the rest days matter as much as the dose days, or what to do if six weeks in you decide microdosing isn’t for you.
This is the long-form guide. Who Fadiman is and why his name is the one attached to it. What the protocol actually does in your nervous system. How to find your dose without overshooting. What to expect across each phase. Why the pause is the most overlooked part of the whole thing. And honest answers to the questions readers actually ask.
Who is James Fadiman, really?
Fadiman is an American psychologist with a Stanford PhD in the 1960s, when psilocybin and LSD research were still legal and active in academic settings. He worked at the International Foundation for Advanced Study under Willis Harman, running early studies on whether psychedelics could enhance creative problem-solving in scientists and engineers.
When the 1970 Controlled Substances Act shut down American psychedelic research, he didn’t move on. He co-founded the Institute of Transpersonal Psychology, which kept training therapists in psychedelic-adjacent modalities for the four decades the official door stayed closed.
In the early 2000s, Fadiman started collecting microdose reports from volunteers across North America and Europe. By 2016, the database held thousands of self-reported experiences. Those reports became the basis for the protocol most people now follow.
His name is attached to it for one reason: nobody else systematically asked the question of enough people to find a defensible answer. His published microdose research is still the most-cited reference in serious conversations about the practice.
His name is attached to it because nobody else systematically asked the question of enough people to find a defensible answer.
What the protocol actually is.
A three-day cycle. Day one is a microdose day. Days two and three are rest days. The cycle repeats for four to six weeks. Then a two-week pause before deciding whether to start another cycle.
The cycle doesn’t reset on Mondays. Start on a Wednesday and your next dose day is Saturday. The one after that is Tuesday. Then Friday. Then Monday. Over a few weeks your dose days slide across every day of the week. That’s intentional. The pattern isn’t built around a weekly schedule, it’s built around giving your brain a consistent on-off rhythm regardless of what day it is.
Why two rest days, not one
Psilocybin has a measurable tolerance curve. Take it two days in a row and the second dose is noticeably weaker. Take it three days in a row and the third is barely registering. The same biology that makes a heroic dose powerful is what makes daily microdosing pointless within weeks.
Two rest days lets your serotonin system reset between doses. The 5-HT2A receptors that psilocybin binds to downregulate quickly with repeated exposure and need 48 to 72 hours to recover. Fadiman didn’t invent that window arbitrarily. It tracks the biology.
Why microdoses, not full doses
A standard psilocybin trip uses 2 to 3.5 grams of dried mushrooms. A Fadiman microdose is 0.1 to 0.3 grams. Roughly one-tenth of a recreational dose. At that range, almost no one feels a perceptual shift. Colours don’t change. Time doesn’t slow down. You can drive, work, parent, and have conversations without anyone noticing anything different about you.
What you’re trying to capture is the subtle baseline change. Slightly steadier mood. Slightly quicker access to focus. Slightly quieter inner critic. Nothing dramatic on any single dose day. The kind of difference you notice over weeks, comparing week one to week four.
This is why pre-measured microdose capsules matter more than people realize. Measuring 0.15 grams of dried mushrooms by hand introduces enough dose variability that the protocol becomes unreliable. One day 0.12g, the next 0.22g. Capsules eliminate that variable. Consistency is the single biggest factor in whether microdosing works for you.
Why this protocol, not the others.
There are three real microdose patterns in circulation. Fadiman is one of them. The other two are the Stamets stack and daily dosing. Each does different work.
| Protocol | Schedule | Evidence base | Sustainability |
|---|---|---|---|
| FadimanRECOMMENDED | 1 day on, 2 off | Strongest | High |
| Stamets stack | 4 days on, 3 off | Mixed | Medium |
| Daily dosing | Every day | Anecdotal | Low |
The Stamets stack, named for mycologist Paul Stamets, pairs psilocybin with lion’s mane mushroom and niacin (vitamin B3) on a four-days-on, three-days-off cycle. The premise is that the three ingredients work together on neurogenesis. The protocol has supporters and the lion’s mane addition has independent science behind it, but the dosing pattern is more aggressive and the evidence base for the combination effect is thinner than for psilocybin alone.
Daily dosing is what it sounds like. One microdose every day, no rest days. It’s the simplest pattern and the one most beginners drift toward without realizing it. It also stops working within weeks because of how fast psilocybin tolerance builds with daily exposure. The people who try this and conclude microdosing doesn’t work are usually running this protocol without knowing it.
Fadiman is the middle path. More structured than daily dosing, less aggressive than the Stamets stack, with the largest survey dataset behind it. It’s also the protocol that’s easiest to sustain over months and easiest to compare experiences with other people on, since most microdosers are running some version of it.
Week 1: Find your dose.
The single biggest mistake first-time microdosers make is starting too high. The protocol is built around finding the smallest dose that produces a real but subtle effect, not the dose that makes you feel something. If you can feel the dose, it’s too much.
Start at the low end of the range. For dried mushrooms that’s 0.1 grams. For a pre-measured capsule, that’s typically a single low-dose cap (100mg of dried psilocybin is the standard starter cap dose). Take it on Day 1 in the morning, with food, on a day where you have something normal to do but nothing demanding.
Pay attention through the day, but not obsessively. Most people feel nothing on Day 1. That’s expected and isn’t a sign the protocol won’t work for you. Microdose effects compound over weeks. The first dose is calibration, not the experience.
Days 2 and 3 are rest days. Don’t take anything. Don’t worry that nothing happened. Make notes on how you actually felt during Day 1 and what your baseline looked like across all three days. That baseline matters more than the dose day. If you don’t know what your normal feels like, you won’t recognize change when it shows up.
Day 4 is your second dose day. Same dose as Day 1, same time, same conditions if possible. By the second dose most people start noticing something. Steadier focus. A small mood lift. Less internal friction. Subtle enough that you’d dismiss it if you weren’t watching for it.
If the first week feels like nothing
It might be nothing. It might be the dose. It might be that you’re not paying close enough attention to your baseline. Don’t increase the dose in week one. Stay at the starting dose through the full first cycle and reassess at the start of week two. Most people who claim microdosing doesn’t work raised their dose in week one because they didn’t feel anything, then ended up at a dose that’s borderline perceptual and concluded the whole practice was either useless or a low-grade trip.
The other good starter option is Dose PURE Golden Teacher. Same Golden Teacher base, single-strain capsules, with no supporting ingredients. Just the psilocybin. If you want to isolate what the psilocybin alone is doing before adding stack ingredients, this is the cleaner starting point.
Weeks 2 to 4: Run the protocol.
By the start of week two, you should have a sense of whether your starting dose is right. If Day 4’s dose felt like nothing, raise the dose slightly for week two (one and a quarter caps, or 0.15g of dried). If Day 4’s dose felt borderline perceptual, your starter dose was too high and you should drop down. If Day 4’s dose produced subtle, real-feeling effects, hold the dose.
Weeks two through four are where the protocol does most of its real work. The subtle baseline changes that were barely there in week one start to feel more stable. The improvements aren’t dramatic on any single dose day. They’re noticeable in how your normal weeks feel.
What people most commonly report across this stretch: steadier focus through the morning, less afternoon energy crash, faster emotional recovery from minor stress, slightly better sleep on rest days, and a quieter version of the inner monologue that usually narrates anxiety. Not everyone reports all of these. Most people report two or three of them within the first month.
What people don’t report: feeling high, euphoric, or noticeably altered. If you’re feeling those, your dose is too high. The whole point of sub-perceptual dosing is that it shouldn’t be perceptual.
If the effects fade mid-cycle
Some people feel real effects in weeks two and three, then notice the effects flattening in week four. That’s tolerance building faster than the protocol’s rest days can compensate for. It happens to a minority of microdosers and the response is to take the two-week pause early rather than push through.
The two-week pause is the most important part of the protocol. We’ll get to it in a few sections.
Tracking: the part nobody tells you about.
Microdose effects are subtle. Without notes you’ll have no idea whether the protocol is working, working slightly, or doing nothing. You’ll convince yourself it’s working when it isn’t, or talk yourself out of effects that are really there. Both happen often.
The fix is simple. Keep a microdose journal. It doesn’t need to be elaborate. A note in your phone is enough.
What to write down
On dose days, before taking the capsule: how you slept, your baseline mood from 1 to 10, your baseline focus from 1 to 10, anything notable from the previous day. After the dose, an hour or two in: any shifts you noticed. End of day: how the day went overall, and the same mood and focus ratings.
On rest days, same end-of-day check. Mood, focus, energy, sleep quality, whether anything notable happened.
This sounds like more work than it is. The whole thing takes ninety seconds a day. After a month you’ll have a clear picture of whether the protocol is shifting your baseline, in which direction, and by how much. That picture is the only honest way to evaluate whether to continue.
What to watch for
Trend lines, not single days. Any single dose day might feel like nothing. The signal lives in the rolling average. After four weeks, look at your mood and focus ratings across all twenty-eight days. If the average is meaningfully higher than your week-one baseline, the protocol is working. If it’s flat, it isn’t, or your dose isn’t right.
Week 6 and beyond: The pause.
After four to six weeks of running the protocol, you stop. Two full weeks. No dose. No exceptions.
This is the part of the Fadiman protocol most people skip and most beginners don’t understand the importance of. The reason for the pause is two-fold.
First, tolerance. Even on a two-day rest cycle, microdose tolerance builds slowly over weeks. By week six, you’re getting less effect from the same dose than you were in week two. A two-week pause resets the receptor sensitivity and lets the next cycle start clean.
Second, signal versus habit. By week four or five, the routine of microdosing becomes ingrained. Some of what feels like microdose benefit is actually the structure and intentionality of the practice itself. Stop for two weeks and you find out which is which. If you feel noticeably worse during the pause, the protocol was doing real work. If you feel basically the same, the structure was doing more work than the substance.
This is also where most people decide whether to continue. Some run two or three Fadiman cycles a year. Some run one cycle ever and integrate what they learned. Some find it doesn’t work for them and stop. All three are reasonable outcomes.
If you feel noticeably worse during the pause, the protocol was doing real work. If you feel basically the same, the structure was doing more work than the substance.
If you decide to continue after the pause
Start the next cycle at the same dose you ended on. Most people don’t need to increase the dose between cycles. If anything, the post-pause cycle often feels stronger at the same dose because tolerance has reset.
If you want to rotate formulas between cycles, that’s a reasonable approach. The Spore Wellness Micro Bundle contains three different formulations (Cognitive, Energy, Immune) and is a natural fit for rotating across three back-to-back cycles. The base psilocybin is the same in each. The supporting ingredients differ.
Set, setting, and microdose-specific safety.
Most psilocybin safety guidance is written for full doses, where set and setting matter enormously. Microdoses are different. You’re not having an experience that requires preparation. You’re integrating a low-grade pharmacological input into your normal life. The safety concerns are different.
Don’t combine with these medications
Who shouldn’t microdose
People with a personal or family history of psychosis or schizophrenia. People with diagnosed bipolar disorder, particularly bipolar I. Pregnant or breastfeeding women, where there’s no safety data. Anyone under 25, where the developing brain adds risk we don’t have research to quantify. Anyone currently on the medication list above.
This isn’t medical advice. We’re a dispensary, not a clinic. If you have a diagnosed mental health condition and want to explore microdosing as part of your overall mental health approach, the right step is a conversation with a clinician who’s actually familiar with psilocybin, not a forum thread.
What to skip dose days for
Acute illness. Severe sleep deprivation. Days where you’re emotionally compromised or in active crisis. Days where you’ll be operating heavy machinery for the first time or doing anything else cognitively demanding under unfamiliar conditions. The protocol works on a steady baseline. Day-to-day judgment about whether today is a dose day is your call.
Common questions, real answers.
Most people notice subtle effects by the second or third dose day, around day four to seven of the protocol. Some take longer. If you’ve completed a full first cycle (four to six weeks) and noticed nothing on any dose day across the whole stretch, the protocol probably isn’t going to work for you at your current dose. Try a slightly higher dose for one cycle before concluding it’s not for you.
Yes, at a sub-perceptual dose. The whole point of microdosing is that it shouldn’t impair function. If you feel impaired, your dose is too high. That said, the first dose day in any new cycle is worth treating cautiously until you know how you respond.
Standard 5-panel and 10-panel drug tests don’t screen for psilocybin or psilocin. Psilocybin tests exist but are rare and expensive and almost never used in employment, insurance, or sport contexts. Practically speaking, no.
Yes. Alcohol on dose days is a different question. Light alcohol on a dose day probably won’t cause harm but it does interfere with the protocol’s signal. Most people skip alcohol on dose days for the same reason they skip it during any health protocol where they’re trying to measure changes.
Skip it and continue on schedule. If your dose day was Monday and you forgot, don’t dose on Tuesday. Wait until Thursday (the next scheduled dose day) and pick up the cycle. Missing one dose in a six-week protocol won’t break anything.
The honest answer is that nobody knows. There isn’t long-term safety data on year-plus continuous microdosing. Anecdotally, the people who run multiple Fadiman cycles per year (with the prescribed pauses between) tend to do fine. The people who skip the pauses or daily-dose for months tend to plateau and lose the effect. The pause is your friend.
Yes, in most cases, and many therapists are open to discussing it. The exceptions are if your therapist has explicitly recommended against it for clinical reasons, or if you’re in treatment for a condition on the “shouldn’t microdose” list above. A good rule of thumb: if you wouldn’t mention starting a new daily supplement to your therapist, you don’t need to mention microdosing. If you would mention the supplement, mention this too.
A microdose is sub-perceptual, 0.1 to 0.3 grams of dried mushrooms. A museum dose (sometimes called a low dose or mini-dose) is barely perceptual, around 0.5 to 1 gram, where you can feel that something is different but you’re not tripping. Museum doses aren’t part of the Fadiman protocol. They’re a different practice with different effects and different risk profiles.
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