Originally posted by Edward
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At any rate, milk has a lot of sugar, and a pretty easily broken-down protein (relative to the protein in meat).
However, in the process of digesting milk, the water is liberated first, and the sugar is broken down easily, while the fat, one of the last parts to break down, is left in the stomach in high concentration, and the glycerides are releasing a short-chain fatty acid called butyric acid.
Butyric acid stinks, and it stinks in high concentrations in the stomach an hour of so after drinking milk. Butyric acid is was makes rotten milk and rancid butter stink, and it is what makes vomit smell. The more dairy in your stomach, the more your vomit will stink, although other foods have butyric acid; milk just has really large amounts.
Human breastmilk has low amounts of it compared with other mammals, which is why puke and poop from breastfed babies is low-odor.
So no, the stomach contents would not be white, but there'd be a real stink if the person had been drinking milk, unless the milk had been drunk just minutes before death-- even then, anerobic bacteria in the stomach would attack it, so even if digestive processes ceased, if the body lay undiscovered, you'd still get a pretty bad stink.
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