The Stem Activator IV is a blend of Thymosin Beta 4 (TB500) + Epitalon + BDNF + BPC157 + IGF peptides which have been mostly researched by the St. Petersburg Institute of Bioregulation and Gerontology, primarily overseen by Vladimir Khavinson, in Russia. TB500 has demonstrated its' propensity to enhance tissue repair as it modulates the immune response. Epitalon is the prototypical 'anti-aging' peptide and has been shown to guide hormone regulation and telomere extension. BDNF stands for brain derived neurotrophic factor and has been shown to be useful in neuro regeneration. BPC157 is another tissue repair peptide, while IGF is a growth factor to enhance growth of new and healthy cells. Alpha-GPC is a potent form of choline and used as a nootropic and neurocognitive enhancements.