How to Evaluate a Biohack and Run a Careful Personal Experiment

Quick answer

Most biohacking claims can be checked with a few questions. A personal experiment can be fun and informative for gentle habits, but it cannot prove a treatment works. This page is for low-risk tracking only. It does not cover injections, unapproved compounds or extreme practices; see experimental approaches.

A claim checklist

1. Who says so? Check the person or company behind the claim, and look for scientific journal articles that support it. [1]
2. Who was studied? People, animals or cells? Healthy or ill? Early-stage findings from animals or cells are preclinical, not proof for humans; see reading early-stage research.
3. What was measured? A lab number or device reading is not the same as feeling or living better.
4. What is the evidence level? Use the labels in how we label evidence.
5. Is it approved or legal? Check the regulator, such as the FDA, for the specific product. [2]
6. What are the risks and who should not do it? See evaluating safety claims.

What a personal experiment is

A single-person experiment is often called an "n of 1." In medicine, N-of-1 trials are single-patient crossover designs with systematic data collection on treatment effects. [3] A review of 54 N-of-1 trials in health psychology found fewer than half reported enough information to judge how much a treatment's effect varied, and said such trials need more rigor. [3] Observational n-of-1 work also exists: one study followed three healthy people for up to four years to explore what affects nighttime heart rate. [4]

Why this is weaker than a trial. Serial observations of one person differ in scientific validity from randomized clinical trials. [5] Your sleep or mood changes for many reasons at once, and expecting a benefit can itself change how you feel.

Gentle, low-risk tracking only

For habits such as a regular bedtime, a short walk or a food or mood diary, a sensible approach is to:

• change one gentle thing at a time;
• note what you measure and why, before you begin;
• compare over weeks rather than days;
• stop if it makes you anxious or obsessive.

Tracking can backfire: clinicians have described people seeking treatment for self-diagnosed sleep disturbances from tracker data, [6] and diet-app use was linked to disordered eating symptoms in one survey. [7] Do not use this approach for medicines, supplements, fasting, extreme temperatures, or anything injected or implanted.

Stop signs and when to see a clinician

Stop and get care for chest pain, fainting, trouble breathing, severe headache, confusion, or any symptom that worries you. See a clinician before changing medicines, if symptoms persist, or before acting on a test result; MedlinePlus advises following up with your provider regardless of a home test result. [2] See talking with a health professional. In a US emergency call 911.