Bones or skin? Good nutrition and a well balanced diet helps in general. Specifically targeting a certain area of the body with a nutrient would be done with creams and are probably experimental treatments not backed by the FDA.
the nutrient that helps the wound heal is vitamin K
yes, but it helps it crawl around
Flouride helps strengthen teeth, if that's what you mean.
nutrient
Fat.
calcium
Sodium
zinc
Proteins
protein
what is the nutrient that helps your body eliminate wasre materials
iron