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In muscle tissue, IGF-1 LR3 is instrumental in increasing the DNA and RNA synthesis, which are crucial for protein synthesis and muscle cell proliferation, leading to hyperplasia (increase in the number of muscle cells) and hypertrophy (enlargement of existing muscle cells)

That said, the following titration table reflects the prevailing clinical approach used by longevity-focused practitioners, calibrated against the available pharmacological data

For example, cyanocobalamin can be risky for people with a condition called Leber's disease, as it might harm the optic nerve

Though human research is still emerging, its mechanism of action is promising for metabolic conditions, obesity, and possibly age-related fatigue