Focus & Brain

Afternoon slump: the post-lunch dip shows up even with an identical lunch. What your body clock, meal size and sleep each add, and what studies say helps.

Supplements for memory and focus, tested on one ingredient: what citicoline trials in healthy adults found, where they stop, and the doses they used.

Citicoline vs alpha-GPC: what each one is, which populations the trials studied, and why EFSA and a 2025 meta-analysis complicate the answer.