My father ,P.Hara Jagannath has been diagnosed with sarcopenia he has seen no weight gain since 7 years and is looking very lean and thin ,aged and wrinkles skin appearance.He has diabetes and cholesterol but they are  already under complete control since many years since his 1st diagnosis with them in 2016.Even though on eating protein foods like eggs and using vitamin d capsules there is no improvement till date .Hence I request you to provide me valuable guidance on treatment or medicine if possible