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Description
One such compound, epithalamin, was found to be a complex peptide bioregulator that could reduce the rate of cellular aging, leading to increased longevity

Insulin receptor substrate (IRS)-2, not IRS-1, protects human neuroblastoma cells against apoptosis

doi: 10.1016/j.fsi.2022.09.065

If you have a B12 deficiency, you may need several weeks of injections to feel the benefits