How do the skin’s accessory structures change over time?

 Over time less sebum is produced (drying of skin and hair), hair growth slows and whitens, nails harden, sensitivity to pain and pressure diminishes, and the ability to control body temperature falters.

it's a nutrition food for pregnant mothers so they unborn child can get its nutrition that it needs to grow in to a healthy baby.

explanation:

and the mother is getting all of her nutrition and her calcium and vitamins .