Supplementation

Software developers spend 90%+ of daylight hours indoors. Vitamin D deficiency affects mood, immune function, cognitive performance, and musculoskeletal health. How to test, what levels to target, and how to supplement intelligently.

Creatine is not just a muscle supplement. The evidence on ATP regeneration in neurons, working memory, mental fatigue, and sleep deprivation makes it one of the most underrated cognitive tools available to developers — cheap, safe, and well-studied.