Gamma waves for focus” tracks are everywhere — but the science behind binaural beats is thinner than the marketing suggests. The brainwave-entrainment mechanism is shaky, focus is the weakest claim of all, and much of the real benefit is likely ritual and expectation. Here’s what the evidence actually shows, and how to test them honestly.
Red light therapy for the brain has a rare combination: more legitimate science than most biohacks, and more overblown marketing than most biohacks. Here’s the honest picture — the real mitochondrial mechanism, the promising-but-early human evidence, and why the device you’d buy probably isn’t the one that was studied.
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.
Frequent sauna use is linked with lower dementia risk in Finnish studies, but heat slows thinking in the moment. What the evidence shows, and safety.
The physiological sigh is two inhales and a long exhale. What the trials show, how to practise it, and why intense breath-holding is risky.
“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.
Cold water raises noradrenaline and often lifts mood, but thinking gets worse while you’re cold. What the studies show, the real numbers, and the safety risks.
