"Fix sleep before reaching for any supplement Huberman notes that when people ask him what supplement to take, "90% of the time, they tell me they either have trouble falling asleep or staying asleep or they don't feel rested throughout the day" — meaning behavioral fixes come first. The hierarchy he recommends is to correct light-viewing behavior, then nutrition timing, then exercise timing, and only then consider supplements. Jumping straight to pills while ignoring morning sunlight or late-night screen habits is like patching a symptom while leaving the cause untouched. Source: Andrew Huberman, Huberman Lab, Master Your Sleep & Be More Alert When Awake"