L-Theanine
Often paired with caffeine for 'calm focus'; evidence suggests reduced jitteriness & improved attention in some contexts.
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Mild drowsiness at high doses — pair with caffeine for balanced alertness or take alone in evenings
Context: doses >400mg
L-theanine (100 mg) + caffeine (50 mg) improved attention-switching speed & accuracy vs. placebo at 60 min; L-theanine alone showed no significant cognitive effects.
L-theanine showed dose-dependent effects on rapid visual information processing & recognition reaction time; non-significant for simple reaction time & Stroop. Overall evidence promising but not conclusive.
Stacks containing L-Theanine
Public community stacks that include this ingredient.
PMS Calmer (Low-Stim, Cycle-Friendly)
Cycle-phase support focused on calm & sleep quality without stimulants.
Focus Stack (No Stimulants)
Supports focus & mental clarity without stimulants.
Sleep & Recovery Stack
Designed to support sleep quality, parasympathetic activation, & overnight recovery without heavy sedation.
Longevity Mix (Bryan Johnson)
Bryan Johnson's Blueprint Longevity Mix is the core daily powder from his self-quantified anti-aging protocol. It combines NAD+ pathway support (CaAKG), collagen precursors (Glycine, Lysine, Vitamin C), joint protection (Glucosamine, Sodium Hyaluronate), mitochondrial support (Creatine, CoQ10-adjacent), and antioxidant defence (Glutathione, Taurine). Every ingredient is dosed at clinically relevant levels validated through continuous biomarker tracking.
Stress Reduction and Mood Balance
Combining Holy Basil with L-Theanine can reduce stress and balance mood. Holy Basil is an adaptogen that helps manage stress, while L-Theanine promotes relaxation without sedation.
Clean Stimulant Focus Stack
Supports alertness with lower jitter risk than caffeine.
Non-Stimulant Focus Stack
Supports attention & cognitive resilience without stimulants.