I drink it sometimes and think it tastes better.
The idea is that pasturization changes the milk by heating, same as how food is changed by cooking. This can have benefits such as easier to digest and protect from bacteria and can also degrade nutrients and make it harder to digest.
The danger from raw milk comes specifically from cow shit. Get a little cow shit in the milk and there's danger of e coli I think is the main one. It's actually dangerous and pasturization is a reasonable safeguard. But it's also overhyped. There's also the issue of plastics leeching into the milk during the pasteurization process due to the heat.
Ultra-pasturization is a bigger issue. It uses higher temperatures so there are more changes to the nutrients, its more like actually cooking the milk. More plastics leeching into it, and it's unfortunately what is used for almost all organic milk that you find. (I hope we can avoid changing the subject to everyone's thoughts on organic)
Ultra-pasteurized gives milk a much longer shelf life so its popular with purely profit minded organizations but I'm pretty sure it's not as good for you
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