Microdosing means taking a very small, sub-perceptual dose of a psychedelic substance, typically psilocybin mushrooms or LSD, on a structured schedule. The goal is not to trip or hallucinate but to take just enough that you might notice subtle shifts in mood, focus, or creativity over time. For psilocybin mushrooms, that range is 0.1 to 0.5 grams of dried material. For LSD, it falls between 5 and 20 micrograms. Getting those numbers right, and understanding what the science actually shows, matters more than most online guides let on.
Dose Ranges for Psilocybin and LSD
The standard microdose for dried psilocybin mushrooms is 0.1 to 0.5 grams, with 0.1 grams sitting at the low end and 0.5 grams representing the upper limit used in clinical research. A 0.5-gram dose of dried Psilocybe cubensis contains roughly 0.3 mg of psilocybin, though potency varies significantly between batches, growing conditions, and species. That variability is one of the biggest practical challenges with mushroom microdosing.
For LSD, clinical studies have tested doses of 5, 6.3, 10, 13, 20, and 26 micrograms. Most people who microdose aim for somewhere between 5 and 20 micrograms. As a rough conversion, 0.1 grams of dried psilocybin mushrooms is considered approximately equivalent to 4.6 micrograms of LSD.
The defining feature of a microdose is that it should be sub-perceptual. If you notice visual changes, body sensations, or a distinct “high,” the dose is too large. Many people start at the lowest end of the range and adjust upward gradually.
The Two Main Dosing Schedules
The most widely followed protocol comes from psychedelic researcher James Fadiman. The schedule is simple: take a microdose on day one, then take two full days off before your next dose. That means dosing roughly every fourth day. You follow this pattern for four to eight weeks, then take a longer break of two to four weeks before starting again. The off days serve two purposes: they prevent tolerance from building (your serotonin receptors downregulate quickly with repeated psychedelic use) and they let you compare how you feel on dose days versus non-dose days.
A second approach, popularized by mycologist Paul Stamets, pairs psilocybin with lion’s mane mushroom and vitamin B3 (niacin). The idea behind the combination is that lion’s mane has shown preclinical evidence of supporting nerve cell growth, and niacin causes blood vessel dilation that may theoretically improve how the other compounds are absorbed. The Stamets protocol typically follows a five-days-on, two-days-off pattern. It’s worth noting that the stacking concept is based on conjecture about how these compounds interact, not on controlled trials testing the combination.
How to Measure Accurately
Accurate measurement is the most important safety step. For dried mushrooms, you need a milligram scale, which reads to 0.001 grams. A standard kitchen scale that reads to 0.1 or 0.01 grams is not precise enough. At these tiny amounts, a difference of just 10 to 20 milligrams can meaningfully change the strength of a dose. A kitchen scale trying to measure 10 mg might round to zero or to 0.01 grams, potentially giving you ten times too much or too little.
When using a milligram scale, place it on a stable, flat surface away from air currents and vibrations. Calibrate it before each session. Use a small lightweight container, tare the scale to zero with the container on it, then add your material. Weigh each substance separately if you’re combining ingredients.
Volumetric Dosing for LSD
Because LSD is active at such tiny quantities, cutting a tab into pieces is unreliable. The substance is rarely distributed evenly across blotter paper. The preferred method is volumetric dosing: you dissolve a tab of known strength into a measured amount of liquid, then use an oral syringe to draw out precise portions.
The process works like this. Place one tab into a small bottle containing a measured amount of distilled water or vodka, typically 10 to 50 ml depending on the tab’s estimated strength. Let it sit for at least 24 hours (many people wait 48) so the substance fully dissolves. If a 100-microgram tab is dissolved in 10 ml of liquid, each 1 ml drawn with an oral syringe contains 10 micrograms. Most microdosers use distilled water or vodka as their liquid. Vodka has the advantage of acting as a preservative, while distilled water works fine for short-term storage. An oral syringe is the most common measuring tool, preferred over eyedroppers for its precision.
Why Off Days and Breaks Matter
Psychedelics build tolerance rapidly. Your serotonin receptors adapt to repeated stimulation, which means the same dose produces progressively less effect if you take it daily. This is precisely why both the Fadiman and Stamets protocols include off days. Without them, the dose would likely stop doing anything noticeable within a week or two.
The longer reset period between cycles (typically two to four weeks) allows your receptors to fully return to baseline sensitivity. People who skip these breaks often report that microdosing “stopped working,” which is almost certainly a tolerance issue rather than a change in the substance itself.
What the Science Actually Shows
The interest in microdosing rests partly on the established neuroscience of psychedelics. These substances activate serotonin receptors inside brain cells, and that activation promotes structural changes in neurons, essentially encouraging brain cells to grow new connections. This process involves signaling pathways related to cell growth and learning. Notably, serotonin itself doesn’t produce these same growth effects, which is why psychedelics appear to do something that ordinary brain chemistry does not.
However, when it comes to microdosing specifically, the controlled evidence is far less impressive than the anecdotal reports suggest. A double-blind, placebo-controlled study using 0.5 grams of Psilocybe cubensis (the upper end of the microdose range) found results that were difficult to separate from placebo. A placebo-controlled trial testing 15 micrograms of LSD in a repeated dosing regimen found no significant analgesic effect in the overall sample. Only in a small subgroup of participants who were less tolerant of cold pain was a marginal effect observed.
This pattern appears repeatedly in the microdosing literature. Self-reported benefits are common and often enthusiastic, but when people don’t know whether they received the real substance or a placebo, the differences between groups shrink dramatically. The placebo effect is powerful, and expectation plays a large role when you believe you’ve taken something that will improve your day.
Side Effects to Be Aware Of
Microdosing is not side-effect-free. Documented adverse effects include insomnia, increased anxiety, worsened mood, low energy, gastrointestinal discomfort, headache, disrupted senses, difficulty with temperature regulation, poor focus, and impaired social functioning. Psilocybin at any dose can raise blood pressure and heart rate. Some people experience nausea, dizziness, fatigue, or paranoia.
The anxiety piece is particularly worth noting because many people begin microdosing specifically to reduce anxiety. For a subset of users, the effect goes in the opposite direction. Starting at the lowest possible dose and tracking your response carefully helps identify this early. If anxiety or sleep disruption worsens over the first week or two, that’s a signal to stop rather than push through.
Legal Status
Psilocybin and LSD remain Schedule I controlled substances under U.S. federal law, which means possession carries serious legal consequences regardless of the amount. A handful of jurisdictions have reduced enforcement priority or penalties. The cities of Ann Arbor, Detroit, Hazel Park, and Ypsilanti in Michigan, along with Washtenaw County, have made personal use and possession of entheogenic plants the lowest law enforcement priority. New Jersey reduced possession of one ounce or less of psilocybin to a disorderly persons offense in 2021. Oregon and Colorado have created regulated frameworks for supervised psilocybin use, though these apply to therapeutic settings rather than personal microdosing at home. Outside the U.S., legal status varies widely by country.
Practical Starting Points
If you decide to microdose, the core steps are straightforward. Choose your substance, acquire a milligram scale or set up volumetric dosing, start at the lowest commonly used dose (0.1 grams of dried mushrooms or 5 to 7 micrograms of LSD), and follow a structured schedule with built-in off days. Keep a simple daily journal noting your mood, energy, sleep quality, and any side effects. This is the only reliable way to distinguish real effects from expectation.
Be skeptical of dramatic claims. The neuroscience of psychedelics is genuinely interesting, and there are plausible reasons to think small doses could have subtle effects on mood and cognition. But the controlled research so far has not confirmed most of the benefits that online communities describe. What microdosing does reliably is create a structured practice of paying attention to your mental state, and that attention itself can be valuable, with or without the substance doing much at all.