You do lose all the benefits of it being raw - the enzymes and so forth. But, there are still a couple of advantages: you know it was cleaner than pasteurized milk to begin with; if it was grass-fed, it's much higher in minerals than feedlot milk; and it isn't homogenized, which makes it more healthful. If it's a really expensive luxury, though, I would opt to use Organic Valley or Natural by Nature milk for cooking. I know for a fact that NbN's cows are entirely grass-fed, and it rings a bell that OV's are as well. So, it's better than cooking with regular pasteurized milk. Personally, I get raw milk from the farm cheaper than I could get pasteurized organic milk at the store, so I don't go that route. But, OV's butter is way cheaper than even butter I make myself with fresh raw cream; so, I frequently use their pasteurized butter for cooking, and save the raw for eating raw or melted but not seriously cooked (melting over veggies, melting gently for dipping artichoke, etc.)