Intermittent Fasting and Brain Health: What the Evidence Shows
Short fasts don’t dull thinking in healthy adults, but they don’t sharpen it either. What the human evidence on fasting and the brain actually shows.

Short fasts don’t dull thinking in healthy adults, but they don’t sharpen it either. What the human evidence on fasting and the brain actually shows.

“Biohacking” gets treated as one philosophy, but sauna, cold exposure, HRV tracking, and fasting each have wildly different evidence behind them. Here’s what each one actually shows — including an honest null result for HRV and cognition that rarely gets mentioned.