100% Pure Tryptophan powder from a leading sports nutrition brand , A precursor of Melatonin and Serotonin , One of 8 essential amino acids , Typically used pre-bed , Available in a range of different sizes , Note: packaging may vary for a limited period of time Safety Information:, ,Food supplements are not intended to replace a varied and balanced diet. Do not exceed the recommended usage. Keep out of reach of children., , , ,Ingredients: 100% L Tryptophan. Directions: Mix 1 scoop (approximately 500mg) with 50ml water, ideally on an empty stomach and immediately before bed., ,