5-HTP (short for 5-hydroxytryptophan) is a derivative of the amino acid tryptophan, an amino acid found in high-protein foods such as meat and dairy products. The body manufactures its own 5-HTP from tryptophan, which, in the brain, is converted into the neurotransmitter serotonin related to various organic functions such as appetite, mood and sleep. The 5-HTP provided by this product is extracted from a natural source, the seeds of an African plant called Griffonia simplicifolia. The extract of this plant is currently one of the most widely used supplements in the world, being especially popular in the USA. In the production of all its herbal extracts, LAMBERTS® takes appropriate precautions to ensure that the raw materials used in its manufacture conform to the strict reference guidelines on contaminants. The recommended daily dosage for this product reflects the 5-HTP levels used in most clinical studies. Our tablets are made in the UK under strict GMP pharmaceutical manufacturing standards. Indications: Take 1 tablet half an hour before meals or half an hour before going to sleep, no more than 3 times a day. Start with 1 tablet daily and increase the amount if necessary.