How can I tell if something actually works?

To determine if something actually works, I recommend following this structured approach:

1. ·

   Define 'works' explicitly Avoid vague claims by setting specific, measurable goals. For example, a knee pain cream works if it reduces pain from 7/10 to 3/10 for 4+ hours without side effects.

2. ·

   Isolate the variable Control confounding factors to ensure changes are caused by the thing you’re testing. For personal tests, use a self-controlled trial (e.g., track pain levels for 1 week without the cream, then 1 week with it—keeping other factors consistent). For products, seek independent tests (e.g., Consumer Reports).

3. ·

   Assess evidence quality Prioritize empirical data over anecdotes. High-quality evidence includes randomized controlled trials (RCTs), meta-analyses, FDA approval, or independent certification. Low-quality evidence includes social media posts, celebrity endorsements, or single small studies.

4. ·

   Check for bias and conflicts of interest Avoid sources with a stake in the outcome. Prefer neutral sources like PubMed for medical research or Consumer Reports for products.

5. ·

   Verify replicability Consistent results across different testers or studies are more reliable. For example, a weight loss strategy is credible if multiple university studies find the same results.

6. ·

   Conduct systematic personal testing Keep detailed logs (e.g., task completion time for a productivity app). Blind yourself if possible to avoid expectation bias (e.g., use a placebo test).

7. ·

   Evaluate risk-benefit tradeoffs Even if something works, it may not be worth it if side effects or costs outweigh gains. For example, a weight loss pill that reduces 5 lbs but causes heart palpitations is not viable.

For high-stakes items (e.g., medical treatments), consult a qualified professional to interpret complex evidence. Proceed with caution and prioritize safety, especially for therapies with limited empirical data.