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A handful of people notice a difference almost right away, while for others it takes a bit longer to kick in

B12 injections can ensure that older adults maintain adequate levels of this essential nutrient, supporting their energy levels and cognitive functions

Semaglutide works by stimulating a hormone called glucagon-like peptide-1 (GLP-1) that targets areas of the brain that regulate appetite and food intake

This, in turn, boosts metabolic rate and activates a gene known as sirtuin-1 (SIRT1), also referred to as the "longevity gene." SIRT1 is involved in reducing the risk of various conditions such as diabetes, obesity, metabolic syndrome, atherosclerosis, cardiovascular disease, kidney disease, liver disease, neurodegeneration, and cancer.

PMID 18020969