Synthetic vitamins provide nutrients in a partially isolated state, which means the body finds them harder to absorb.

To grow healthy plants you try to provide nutrients and protection from insects, but you don't keep pulling the plants up every day to check their progress.

Total starvation occurs in about eight weeks, as the body destroys its own organs and tissues to provide nutrients.

Astrocytes are specific to the central nervous system; they provide nutrients, physical support, and insulation for neurons.

The purpose can be, as with alley cropping, to provide nutrients, in leaf form, to the crop.