Filler, Additive & Preservative Free
Tryptophan was first isolated in 1901, from the milk protein 'casein', by Sir Frederick Gowland Hopkins. By feeding mice a diet devoid of tryptophan, he was later able to demonstrate that it is essential for animal life.
As well, he demonstrated that tryptophan and several other amino acids cannot be manufactured in the body and must be obtained from the diet.
He was awarded the Nobel Prize for his discovery of vitamins, produced by amino acids like tryptophan. Tryptophan was widely available as a nutritional supplement throughout the 1980's.
Like other food supplements, it has been produced for many years by fermentation, in which large quantities of bacteria are grown in vats, and the protein is extracted and purified.
L-Tryptophan is a precursor to serotonin. Without it we cannot produce serotonin in our brain.
This fact makes it a fantastic possibility in sharp contrast to Selective Serotonin Reuptake Inhibitors.