Proof?I'd be mindful of raw oyster consumption too. Raw oysters are high in thiaminase, which tends to break down thiamine. Despite all the trendy attention fat soluble vitamins get, thiamine is probably single handily the most important nutrient in the body. If you're deficient in it, nothing is going to work correctly, literally nothing. Thiamine is right up there with thyroid in terms of importance.
Of course, if you balance you consumption correctly, raw oysters are great because of the high zinc content. Just remember to not overdo them.
And you don’t even realize what you are saying. If thiaminase is in there THATS GOOD. Its an enzyme that helps us digest the thiamine.