Jen - Michael Pollan is an author. A food anthropologist of sorts. He has written such books as
In Defense Of Food and
The Omnivores Dilemma.
The Omnivore's Dilemma touches on a "dilemma" (aptly named book) with skim milk. Skim milk often doesn't contain the hormones present in milk - even trace amounts in organic milk and milk from cows not treated with hormones - because the milk fat that harbors these hormones has been removed. On the other hand, skim milk often contains powdered milk which is known to contain oxidized cholesterol. Pick your poison, I guess