The difference between the two may be illustrated by the two paths to osteoporosis.
There is a gradual thinning of the bones with aging even in people with presumptively adequate nutrition (sufficient levels of all essential and V3 nutrients, not just adequate calcium and vitamin D).
There is an accelerated thinning of the bones that occurs with poor diet (deficiencies in any essential or V3 nutrient). This development requires only time – it would occur even if the process of aging could be arrested. Unless of course, aging is due to inadequate nutrition.