What is 5 HTP? 5 HTP is a compound made from the naturally occurring amino acid tryptophan, and precursor to the neurotransmitter serotonin. Why use 5 HTP? Each capsule provides 50mg of 5 HTP sourced naturally from Griffonia seed. Who can benefit? These premium quality capsules offer a fantastic way for anyone seeking to naturally boost their 5 HTP levels. To be taken as part of a varied and balanced diet and a healthy lifestyle.