Real people. Real experiments. Real results.
What habit actually sticks?
What supplement really moves the needle?
Run the experiment - or learn from people who already did.
Loved by 250,000+ members
Loved by 250,000+ members
How PEERtrainer Works
Structured experiments, real people, honest outcomes. No gurus, no hype.
Join an Experiment
Browse structured experiments with clear hypotheses, protocols, and measurement plans. Find one that fits your goals.
Log Your Progress
Quick weekly updates track your adherence, outcomes, and experiences. Takes just 2 minutes.
See Real Outcomes
View aggregated results from your run. Filter by people like you -- age, goals, and lifestyle.
Featured Experiments
Join a live experiment or explore completed results.
Go 30 days completely caffeine-free: no coffee, tea, energy drinks, soda, chocolate, or other sources. Track changes in mental clarity, energy, sleep, and mood while staying accountable in a supportive group setting.
Begin each morning without reaching for your phone — no scrolling, notifications, or news until after the first hour. Track how this shift affects your focus, mood, and morning stress levels.
Set aside 30 minutes each day to read any book, article, or other material of your choice. Discover how this routine can boost focus, relaxation, and knowledge over time.
Set aside time each week to organize and clean up your digital spaces—apps, browser tabs, photos, and inboxes. Track how this routine impacts your sense of mental clarity and levels of overwhelm.
Eat each meal without distractions from screens, work, or multitasking. Notice how focusing solely on eating affects your sense of fullness, satisfaction, and digestion.
The Trust Layer Health is Missing
We don't claim “this works.” We show what happened to people like you.
Peer-Driven
Real outcomes from real people, not influencer opinions or marketing claims. See what works for people like you.
Structured
Every experiment has a hypothesis, set of rules, and measurement plan. No guesswork.
Segmented
Filter results by "people like me" - age, sex, goals, lifestyle. Your context matters.
Transparent
Self-reported, run-based outcomes. Honest, understandable, and never behind a paywall.
See What People Learned
The point isn't just posting - it's learning from shared experiments.
What Our Members Say
Real stories from real members - unfiltered and unsponsored.
Built on 21+ Years of Trust
One of the First Health Communities on the Web
PEERtrainer launched in 2005 and was recognized by the New York Times, Forrester Research, and PEOPLE magazine within its first two years. 250,000 members later, we're still the place where real people share what actually works.
21+
Years Building Health Communities
70M+
Unique Visitors Since Inception
$1B+
Partner Revenue Created
250K+
Community Members
As Featured In
Experiments Across Real Life
Way more than health. Explore experiments in every corner of life.
Health
Sleep, energy, nutrition, recovery
Habits
Routines, consistency, daily rules
Confidence
Rejection reps, social courage
Food & Drink
Meal timing, diets, experiments
Focus
Deep work, attention, screen time
Friendship
Reconnection, outreach, consistency
Relationships
Dating, connection, vulnerability
Style
Uniforms, identity, appearance
Fitness
Strength, cardio, body comp
Fun
Weird, playful, curiosity-driven
Three Pillars of PEERtrainer
Live Experiments
Structured, time-bounded experiments with clear rules. Join a run, follow the plan, and see what happens across hundreds of members.
Peer Outcomes
Real results from real people on foods, supplements, protocols, and devices - aggregated across thousands of tracked experiments and segmented by people like you.
Communities
Identity-based groups - Women 45+ Recomp, Bone Health, GLP-1 Users - that run experiments, share outcomes, and build knowledge together.
Frequently Asked Questions
Everything you need to know about PEERtrainer experiments.
Ready to See What Actually Works?
250,000+ members are already running real experiments and discovering real outcomes. Free to start.
Join PEERtrainer Free