Every amino acids entry in the Typed supplements library. Each one is a full page: what it does, stage by stage, and what the evidence says.
- Collagen PeptidesA protein your body breaks apart like any other.
- GABAThe brain’s primary calming chemical, sold as an oral supplement — the interesting part is that it probably can’t get into your brain the way the marketing implies, yet small trials still find modest relaxation effects.
- GlycineA simple amino acid that happens to have a calming effect.
- L-AlanineA building-block amino acid your body makes on its own, and uses like a delivery truck — carrying spare nitrogen from muscle to liver, especially when fasting or exercising hard.
- L-CysteineA sulfur-containing amino acid your body mostly makes itself — genuinely important for building glutathione and strong hair/nail keratin, and famous in medicine as an emergency antidote, though everyday supplement benefits are much less established.
- L-HistidineA building-block amino acid your body needs to make protein, red blood cells, and histamine — the compound behind allergy symptoms and stomach-acid signalling.
- L-LeucineA building-block amino acid your body can’t make on its own, and the specific one that tells your muscles “start building” after you eat protein.
- L-LysineA building-block protein your body needs, sold mainly as a cold sore remedy — though the proof is shaky.
- L-MethionineA building-block amino acid your body needs for its normal, everyday chemistry — especially reactions that add or remove tiny “methyl” tags on molecules throughout your cells.
- L-OrnithineA non-essential amino acid your body makes itself and uses to help clear ammonia — studied in small trials for exercise fatigue and, separately, for stress and sleep, with genuinely interesting but limited results so far.
- L-PhenylalanineA building-block amino acid your body converts into tyrosine and then into brain chemicals like dopamine — but there’s a critical exception: people with PKU must avoid it entirely.
- L-ProlineA building-block amino acid your body makes on its own and uses heavily to build collagen, the protein that gives skin, joints, and connective tissue their structure.
- L-SerineA building-block amino acid your body makes on its own, and an active area of research into brain and nerve health — though the exciting findings so far are mostly early-stage.
- L-TheanineCalm without making you sleepy.
- L-TryptophanAn essential amino acid your body can’t make itself — a real building block for serotonin and melatonin, with decent evidence for helping with sleep and a real safety history worth knowing about.
- L-TyrosineA building block your brain uses for dopamine — helpful mainly when you’re under real stress, not as an everyday focus booster.
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