Sometimes called wolfberries, they’ve been part of Chinese medicine for thousands of years. They have vitamins (C, B2, and A), iron, and antioxidants. Scientists have looked for proof that they boost immunity, fight heart disease, help the brain, aid digestion, and prevent cancer, but so far, they don’t know for sure. Only eat them ripe. Unripe ones can be toxic. And don’t eat them if you’re pregnant, nursing, or taking blood thinners.