"I just defer to the full fat dairy," she says. "You never know what's going to be in that pistachio milk, in that almond milk." If you're on a weight loss plan, it is seductive that one cup of unsweetened almond milk has 30 calories,. But some of these like oat milks and like the other stuff really bad. I mean, it really became like a cult. Some people got really into it.