Skimmed Milk and Fat-Soluble Vitamin Absorption
Removing the fat from milk also reduces much of its naturally occurring fat-soluble vitamins, particularly vitamins A and D. As a result, plain skimmed milk contains very little of these vitamins unless they have been added back through fortification.
Vitamin D plays an important role in helping the intestine absorb calcium efficiently. Without enough vitamin D, your body may not absorb calcium as effectively, even if your calcium intake is adequate. For this reason, many commercially available skimmed milk products are fortified with vitamins A and D. Always check the nutrition label, as fortification practices vary between brands.
If skimmed milk is your primary source of dairy, ensure you get enough vitamin D through fortified foods, safe sun exposure, or supplements if recommended by your doctor. This may be particularly important during pregnancy, in older adults, during periods of limited sun exposure, or for people at risk of vitamin D deficiency.