Chia is grown commercially for its seed, a food that is rich in omega-3 fatty acids. chia seeds are small ovals with a diameter of approximately 1 mm. They are mottle-colored with brown, gray, black, and white. “Chia” means strength in the Mayan language. A 100-gram serving of chia seeds is a rich source of the B vitamins, thiamine, and niacin, and a good source of the B vitamins riboflavin and folate. The same amount of chia seeds is also a rich source of the dietary minerals calcium, iron, magnesium, manganese, phosphorus, and zinc.