Contrary to popular belief, they don't mean that all but 1% or 2% of the fat has been removed. Rather they refer to what percentage of the total weight is milk fat. For example, one cup of milk ...

indigestible 2. It turns out that this ingredient — a class of molecules called human milk oligosaccharides (HMOs) — is not there to feed the baby at all. When these intriguing molecules were ...