Tryptophan

Uses

How it works

Benefits

Dosage & preparation

Risks & contraindications

Interactions

Evidence quality

Where it comes from

Highlighted claims

• Tryptophan is an essential amino acid and the direct biochemical precursor to serotonin. — Chocolate Addiction: The Brain Chemistry Behind the Craving
• L-tryptophan must be taken on an empty stomach to be absorbed effectively. — Boost Your Serotonin: The Happy Hormone
• When taken alongside other proteins, competing amino acids block tryptophan's absorption and transport across the blood-brain barrier. — Boost Your Serotonin: The Happy Hormone
• L-tryptophan is an amino acid that the body converts directly into serotonin. — Boost Your Serotonin: The Happy Hormone
• Tryptophan is an essential amino acid that cannot be synthesized by the body and is the direct dietary precursor to serotonin, which is in turn the precursor to melatonin. — 11 Ways to Boost Your Melatonin and Sleep Like a Baby
• Tryptophan's biological action is suppressed when methionine intake is high. — Methionine, Tryptophan, and Circadian Hormone Optimization
• The body can synthesize B3 endogenously from the amino acid tryptophan, providing a critical secondary source of niacin. — Still Bloated Even with Apple Cider Vinegar? The Vitamin B3 Connection
• Serotonin converted from tryptophan produces feelings of calm, contentment, and reduced anxiety. — Chocolate Addiction: The Brain Chemistry Behind the Craving
• Serotonin is one of the brain's primary regulators of mood stability. — Chocolate Addiction: The Brain Chemistry Behind the Craving
• The optimal window for L-tryptophan supplementation is right before bed on an empty stomach. — Boost Your Serotonin: The Happy Hormone