Used primarily as an immunosuppressant to prevent organ transplant rejection, especially in kidney transplants. It works by inhibiting a key pathway involved in cell growth and immune response. Also utilized in drug-eluting stents to prevent restenosis by limiting smooth muscle cell proliferation. Investigated for its anti-aging properties due to its ability to modulate cellular aging processes. Shows promise in treating certain cancers, as it can suppress tumor growth by interfering with signaling pathways that promote cell division. Currently studied in neurodegenerative diseases and metabolic disorders for its potential to improve cellular health and longevity.