Tryptophan Benefits

Tryptophan causes drowsiness and fatigue, so it works if you are looking for a sleep aid, as shown in this study where 4g of tryptophan reduced awakenings and increased stage 3 and REM sleep.

Elevated tryptophan levels in the brain have been shown to cause fatigue during exercise. Tryptophan competes with Branched-Chain Amino Acids (BCAAs) for uptake into the brain, meaning that supplementation of BCAAs will assist in reducing fatigue (study 1, study 2).

Tryptophan also increases pain tolerance.

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