Side effects and watch-outs
- Caffeine: insomnia (avoid after 2pm)
- Caffeine: tolerance buildup
- Caffeine: dependence with daily use
- Caffeine: tachycardia
- Theanine: mild sedation
- Combined: generally excellent tolerability vs caffeine alone
Blend / Cognitive
L-Theanine + Caffeine Stack
Gold standard cognitive stack. L-Theanine (200 mg) + Caffeine (100 mg) in 2:1 ratio. Caffeine provides focus and stimulation; Theanine smooths the edge and prevents anxiety. Synergistic.
Educational reference only. This page does not diagnose, prescribe, or replace care from a licensed professional. Laws, availability, and clinical appropriateness vary by location.