Yeah RR. I usually drink about 3 cups of whole milk a day but I tried upping it a little and after about 4-5 cups I felt rough. Better to work up to it? I just can't imagine drinking an entire gallon a day. Especially thinking how expensive that would get. A gallon is about 4 dollars. That's about $125 a month on milk alone! I love milk though...and if it works,I'm doing it!