Amino acids
Explore articles on Amino acids.

ADHD and L-Theanine: What the Small Studies on Sleep and Focus Have Actually Found So Far
L-theanine turns up in plenty of calm and focus supplements. Here's what the small ADHD studies on sleep and attention found, where they fall short and what UK guidance says.

ADHD and L-Tyrosine: The Dopamine Connection Explained, and Why the Evidence Is Still So Thin
L-tyrosine gets sold as a natural dopamine booster for ADHD. Here's how it actually works, what the one small ADHD trial found and which medicines it might affect.