Passion fruit contains a lot of antioxidants. In particular, it’s rich in vitamin C, beta carotene, and polyphenols.Polyphenols are plant compounds that have a range of antioxidant and anti-inflammatory effects. This may reduce your risk of chronic inflammation and conditions like heart disease. A single-fruit serving of passion fruit provides around 2 grams of fiber — quite a lot for such a small fruit.Fiber is important for keeping your gut healthy and preventing constipation, yet most people don’t eat enough of it. Soluble fiber helps slow the digestion of your food, which can prevent blood sugar spikes .Diets that are high in fiber are also associated with a lower risk of illnesses, including heart disease, diabetes, and obesity .