Milk

https://elemental.medium.com/time-to-question-everything-you-know-about-milk-12c08b13e98a

Presently the guidelines about milk are completely full. Indeed we should avoid sugars from milk I mean galactose and we should avoid skimmed milk. On the other hand grass fed milk has a very good nutritional fat content which we can eat as cream and we also can eat cheeses because there is no sugar and because proteins are digested pre-digested by bacteria.