If you know you can tolerate dairy and you don’t want to avoid it completely, make sure you are consuming dairy from certified organic, grass-fed sources. Raw and fermented milk from trusted sources is a great option to consider. Make sure you opt for the full-fat version for some extra health benefits. Milk, cheese, yogurt, butter, ghee, and kefir from other animals such as goat, buffalo, sheep and camel are other alternatives as well. Be cautious of whey and casein protein powders, even if they come from certified organic and grass-fed sources (see my list of the best clean protein powders).