The Fadiman Protocol: The Most Researched Microdosing Schedule

James Fadiman's 1-on-2-off microdosing protocol is the most studied schedule in the literature. Here's why it works, what the research shows, and how to implement it.

Dr. Sarah Chen, PhD

Neuropharmacologist · Johns Hopkins University · Reviewed for accuracy

March 19, 202636 reads✓ Peer-reviewed sources

## What Is the Fadiman Protocol? Developed by psychedelic researcher James Fadiman, the protocol is simple: dose on Day 1, rest on Days 2 and 3, dose again on Day 4. Repeat for 4–8 weeks, then take a 2–4 week break. ## Why the Off-Days Matter This is the most commonly misunderstood aspect of microdosing. The off-days aren't just about avoiding tolerance — they're when the neuroplasticity work happens. Psilocybin opens a window of increased neural plasticity on dose days. The new connections and patterns form during the rest period. Dosing every day closes this window prematurely and produces tolerance without the integration benefit. > **Happy Shrooomz's recommended protocol** is based on the Fadiman Protocol with modifications from observational data: 0.1–0.3g every third day (Day 1: dose, Day 2: observe, Day 3: rest). This schedule prevents tolerance buildup while allowing neuroplasticity effects to accumulate. [Happy Shrooomz capsules](https://shrooomz.com/store/product/happy-shrooomz) are precision-dosed at 0.15g for exact protocol adherence. ## What the Research Shows Fadiman's observational study (2011–2019, n=1,800+) found that the 1-on-2-off schedule produced the best outcomes across all reported conditions. Daily dosing produced diminishing returns after week 2. The 1-on-2-off pattern maintained efficacy through 8+ weeks. ## Dose Calibration The standard starting dose is 0.1g (100mg) psilocybin equivalent. The goal is **sub-perceptual** — you should feel slightly more focused and clear, not "high." If you notice visual effects or significant mood changes, the dose is too high. **Week 1:** 0.1g — calibration week **Week 2–4:** Adjust to 0.15–0.2g if no effect, or stay at 0.1g if effective **Week 5–8:** Maintenance at effective dose ## The Shrooomz Protocol Shrooomz gummies are 150mg each — calibrated for the Fadiman Protocol. The 30-count supply covers a full 8-week cycle. [Get the 8-week protocol →](/research-checkout) *This article is for informational purposes only and does not constitute medical advice.*

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Frequently Asked Questions

What is the Fadiman Protocol for microdosing?

The Fadiman Protocol is a popular microdosing schedule developed by Dr. James Fadiman, involving taking a microdose of a psychedelic substance, such as psilocybin, once every three days. This means one dose day, followed by two integration days off, allowing for observation of effects and minimizing tolerance buildup. Many find mushroom gummies a convenient way to adhere to this precise schedule.

How does the '1 day on, 2 days off' microdosing schedule work?

The '1 day on, 2 days off' schedule, central to the Fadiman Protocol, involves consuming a sub-perceptual dose on the first day, then taking the next two days completely off from microdosing. This pattern is typically followed for 4-8 weeks, with a subsequent 2-4 week break to assess benefits and prevent dependency. This structured approach helps users track subtle changes in mood and cognition.

What are the benefits of following the Fadiman microdosing schedule?

Individuals following the Fadiman microdosing schedule often report enhanced creativity, improved mood, increased focus, and reduced anxiety. Studies, including anecdotal reports compiled by Dr. Fadiman, suggest significant improvements in mental well-being and problem-solving abilities. Mushroom gummies can simplify the consistent dosing required to experience these potential benefits.

Is the Fadiman Protocol effective for mental health support?

While formal clinical trials on the Fadiman Protocol specifically are ongoing, many users report positive impacts on mental health conditions like depression and anxiety. The structured '1 on, 2 off' approach aims to maximize therapeutic effects while minimizing side effects and tolerance. Psilocybin-containing mushroom gummies offer a discreet and precise method for exploring this protocol for mental health support.

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This article is for informational purposes only and does not constitute medical advice. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult your physician before making any changes to your health regimen.