So back in high school, I developed a milk allergy. Every time I drank it or had food with dairy after that, had to be near a bathroom in the very near future. For a while I assumed it was a lactose allergy, but later I discovered I couldn't handle whey protein either, and Lactaid milk had the same effect. Doc said it could be a protein allergy.

Lived a mostly dairy-free life for 15 years, but someone asked me about "A2 Milk." Thought it was dumb, bought some, slammed it today, and no issues!