In Encounter at Farpoint Data gives McCoy a tour of the Enterprise.
Why did they put DeForest Kelly in old-man makeup? Would it have been too much of a stretch to believe geriatric care in the second half of the 24th Century could slow down both the physicality and appearance of aging and have the old McCoy look as young as Mr. Kelly?
Why did they put DeForest Kelly in old-man makeup? Would it have been too much of a stretch to believe geriatric care in the second half of the 24th Century could slow down both the physicality and appearance of aging and have the old McCoy look as young as Mr. Kelly?

AFAIK, age 100 or thereabouts is considered the prime of life in the 24th century. So McCoy should not have looked as old as he did. Especially since he's a doctor and would know how to keep himself in shape.)