Marquis-Nutra Foods Chia Seed is high in protein and high in calcium, with 5 times the calcium of milk, 631 mg per 100 grams of seed. Chia seed is also high in protein, with 18 grams per 100 grams of seed. Chia seed is rich in antioxidant oils. It contains chlorogenic acid and caffeic acid as well as myricetin, quercetin and kaempferol flavonols. These compounds are both primary and synergistic antioxidants and contribute in a major way to the strong antioxidant activity of chia.