L-Tryptophan

L-Tryptophan Formulas

L-tryptophan is an essential amino acid and precursor to serotonin, commonly chosen to complement normal sleep patterns and mood balance as part of an evening routine, building on its well-known association with the relaxed, sleepy feeling sometimes attributed to tryptophan-rich foods like turkey. Our range is sourced from trusted brands offering clearly stated dosing, typically taken in the evening given its relevance to serotonin and, downstream, melatonin production involved in normal sleep regulation. As an essential amino acid, tryptophan must come from the diet, and is naturally found in protein-rich foods such as poultry, eggs, cheese and seeds, though supplemental forms allow for more concentrated, standardised dosing than is practical through food alone.

Food supplements should not replace a varied and balanced diet and a healthy lifestyle.

€31.80 
Optimized Tryptophan Plus vegetarian capsules deliver 1000 mg of high‑quality L‑Tryptophan per serving (3 capsules), plus 250 mg L‑Lysine and 66 mg niacinamide, with proprietary hops (Perluxan®) and rosemary extracts. Gluten‑free, non‑GMO, vegetarian formula designed to support healthy sleep patterns, balanced mood, stress response and satiety. Take up to...
Life Extension

L-Tryptophan - 90 vegetarian capsules | Life Extension

Life Extension
01722
€32.74 
L‑Tryptophan vegetarian capsules deliver 500 mg of premium-quality L‑tryptophan per capsule. Gluten‑free, non‑GMO vegetarian formula designed to support healthy sleep patterns, balanced mood, natural stress response and satiety. Take one to three capsules daily on an empty stomach, preferably separately from protein or amino acids.
€8.91 
Food supplement with L-tryptophan. Swanson Premium L-Tryptophan provides 500 mg of L-tryptophan per capsule. This single-ingredient amino acid formula is supplied in capsule form for convenient daily use as part of a balanced diet.
Doctor's Best

L-Tryptophan, 500mg - 90 vcaps | Doctor's Best

Doctor's Best
P7082
€28.73 
Food supplement with L-tryptophan. Doctor’s Best L-Tryptophan 500 mg offers a pure and high-quality source of this essential amino acid. Produced via advanced fermentation, this vegetarian formula supports convenient and flexible daily use.
Now Foods

L-Tryptophan, 500mg - 120 vcaps | NOW Foods

Now Foods
P24999
€27.06 
NOW® L-Tryptophan 500 mg Veg Capsules provide 1,000 mg free-form L-Tryptophan per 2-capsule serving. Vegan-friendly cellulose capsules with rice flour, ascorbyl palmitate and vegetable-source stearic acid. Produced in a GMP facility; free from wheat, gluten, soy, milk, egg, fish, shellfish, tree nut and sesame.
Now Foods

L-Tryptophan, 500mg - 60 vcaps | NOW Foods

Now Foods
P29267
€15.09 
Food supplement with L-tryptophan in vegetarian capsules. Provides free-form amino acid in capsule format, following the official label. No unauthorized health claims.
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