Question

why the dietyry requirment of a tenager are different an old man​

Answer 1

$\huge\pink{\fbox{\tt{αɴѕωєя}}}$

Due to their age difference their dietary requirements are different.

Answer 2

Aging is linked to changes that can make you prone to deficiencies in calcium, vitamin D, vitamin B12, iron, magnesium and several other important nutrients. It may also reduce your ability to recognize sensations like hunger and thirst.