L-Tryptophan
2 brands compared · cheapest first
Life ExtensionBest value
L-Tryptophan 500 mg
500 mg L-tryptophan · 90 capsules
$24.75for 90 doses
$0.275per dose
$0.00055 / mg
Best value 3x cheaper than PE. Optimized Tryptophan Plus 1000mg (B00CBFC9T2, $24/90 caps) is the higher-dose option.
Pure Encapsulations
L-Tryptophan
500 mg L-tryptophan · 90 capsules
$72.50for 90 doses
$0.806per dose
$0.00161 / mg
Note
Thorne doesn't carry standalone L-tryptophan.