Zucchini is an excellent source of manganese and vitamin C, as well as a good source of potassium and magnesium, says Natalie Rizzo, RDN, founder of plant-based nutrition blog Greenletes. “Vitamin C is known for its immune system benefits, and it’s also an antioxidant that helps prevent inflammation in the body. Potassium and magnesium are electrolytes that contribute to heart health, blood pressure regulation, and hydration.”