What is Serotone and what is it used for? Dietary supplement based on tryptophan, vitamins B3-B6 and zinc. Serotonin precursor. Instructions for use Take 1 Serotone capsule daily, between 4pm and 5pm, or as directed by a healthcare professional. Avoid eating meat and meat products at dinner. Composition The ingredients of Inovance Serotone are: L-tryptophan, vegetable-based tunic [hydroxypropyl methylcellulose], anti-caking agent [vegetable-based magnesium stearate], zinc gluconate, niacinamide (vitamin B3), anti-caking agent [silicon dioxide], pyridoxine hydrochloride (vitamin B6). Each capsule contains: L-tryptophan......220 mg Vitamin B3.....8 mg Vitamin B6.....0.7 mg Zinc................1.5 mg