Pal-AHK is also known as Palmitoyl Tripeptide is a research peptide that is still being investigated. It is not for human use. Studies with Pal-AHK or Palmitoyl Tripeptide have found it to have positive results in helping with aging problems such as hair loss, hair growth, and wound healing. Pal-AHK works by increasing collagen and elastin production. It is often referred to as the cosmetic peptide.