Chocolate Peanut Butter PMS Smoothie: This chocolaty smoothie is made with Greek yogurt and chocolate soy milk, both of which are rich in calcium, which has been shown to help reduce PMS. There's also fiber-rich spinach, full of B vitamins such as riboflavin and thiamine, proven to decrease PMS symptoms. The banana and cashews offer magnesium, which relieves bloating and constipation and also eases cramps. .... I'm going to use chocolate almond milk instead of soy milk.