Chia seeds are a complete protein with all the amino acids that your body needs from an external source. 2. Chia seeds are “the richest plant source of omega-3 fatty acids.” 3. Chia seeds contain polyunsaturated fat, fiber, protein, calcium, phosphorus, and zinc. 4. Chia seeds have a lot of other health benefits when combined with a healthy way of eating, including affecting cardiovascular health, weight, digestion, and cholesterol. (SOURCE)