This article originally appeared in Women's Health.

When you hear “high-antioxidant superfood snack,” you probably think of popular all-stars like blueberries, acai bowls, and chia pudding. But Mike Roussell, Ph.D., a nutrition consultant in Pittsford, New York, and the author of The MetaShred Diet, says it’s high time for you to add pistachios to that most-valuable-foods list.

“I eat them as a snack every single afternoon,” Roussell says. “In the mornings, if I have yogurt or oatmeal, I’ll add pistachios to that too.” Wondering why he’s so passionate about these little green gems? The nutrition pro points to these five health-boosting benefits.