Peptides are trending in longevity and biohacking circles. But what does the science actually say? Some peptides have robust human clinical trials, while others are based only on animal studies or Dihexa (8mg) x 30 Tablets Alpha BioMed Dihexa 10mg Capsules Cognitive Research Support Peptide Pure Bio Labs Dihexa (also known as PNB 0408) is an experimental small molecule derived from angiotensin IV. It was engineered to cross the bloodbrain barrier and has shown synaptogenic effects in preclinical models. The often quoted