Focus & Cognition

Attention, focus, memory and mental performance — evidence-based tools and routines.

Complete guide How Can I Improve Focus and Cognitive Performance? An evidence-based look at what reliably supports focus: sleep, exercise, light and caffeine first, with realistic expectations for supplements.

Protocols & questions

Caffeine and L-Theanine: Does the Combination Improve Focus?
Studies commonly pair about 100 mg of caffeine with 200 mg of L-theanine. The combination may help attention with fewer jitters, but effects are small.

Updated October 8, 2026 Sample