By activating telomerase and enhancing immune surveillance, the peptide can slow tumor growth and promote cellular apoptosis in malignant cells Anisimov et al., Neuroendocrinology Letters , 2003
IV glutathione works faster
The vitamin D receptor (VDR)-PPAR crosstalk enhances adipocyte insulin responsiveness, while its suppression of the renin-angiotensin system lowers OS that interferes with insulin signaling (225)
Maiorino M, Scapin M, Ursini F, Biasolo M, Bosello V, Floh L (2003) Distinct promoters determine alternative transcription of gpx-4 into phospholipid-hydroperoxide glutathione peroxidase variants
Kroemer G, Lopez-Otin C, Madeo F, de Cabo R
And now the extra bonus, which is the fifth is peptides