<p>nymom: the idea is that whenever they take something out of a food, something must be replaced to keep it at the same consistency, or nutritional value, So, in many low fat milks, nonfat dry milk is added back in; vitamin a is added because it comes out with the fat; vit d is added because the cows don’t spend enough time ( or any) in the sunshine to make vit d.
other additives are palmitate ([Q</a> and A - Q and A - Stand-In Vitamin - Question - NYTimes.com](<a href=“http://www.nytimes.com/2002/12/10/science/q-a-stand-in-vitamin.html]Q”>Q&A; Stand-In Vitamin - The New York Times)) other links to additives in low fat milk: [additives</a> to low fat milk - ??? Google?](<a href=“additives to low fat milk - Google Search”>additives to low fat milk - Google Search)</p>