There’s a reason sweet potatoes rank the most nutritious of all vegetables. “Their levels of Vitamin A are off-the-charts,” says Klein. “They’re also a disease-prevention powerhouse food,” rich in antioxidants and anti-inflammatory properties. And they’re a great form of starch, supplying the glucose needed to fuel our brain, muscles and organs. It’s a tasty reminder not to cut carbs; they’re essential to optimal health.