Antioxidants found in chia seeds can help to fight free radicals in your body. Chia seeds contain quercetin, an antioxidant that can reduce your risk of developing several health conditions, including heart disease. The seeds are also high in fiber, which can help to lower high blood pressure and, in turn, reduce your risk of developing heart disease. Chia seeds have several nutrients that are vital for bone health, including magnesium and phosphorus.