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.
## 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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