TX Vitamins 5 HTP 528mg supplement is scientifically formulated. 5 HTP 200mg & Calcium 328mg* Mood Enhancing Supplement: 5-HTP is a natural precursor to serotonin, the "feel good" brain substance that supports moods, Stress. 5 HTP promotes relaxation in a 100% drug-free way for a calm and relaxed mood by enabling the body's synthesis of serotonin, the chemical messenger that greatly helps in enhancing mood.* Fast Absorbing: 5HTP supplement is fast absorbing into the body and brain and helps promote better sleep. 5-HTP is naturally occurring plant-derived amino acid that helps the body to synthesize serotonin. Serotonin in our body naturally relaxes mind, body and allows us to get a better night's sleep.* Calcium Enriched premium formula: Our 5 HTP capsules have extra 328mg of Calcium per serving to greatly enhances deeper and longer sleep, and boosts higher tranquility and calmness** Reliability and Quality; TX Vitamins 5 HTP supplement Made in a GMP certified lab in USA and third party safety tested for purity & Potency.