Learn how to serve chia seeds to your baby, for either baby-led weaning or as a puree. Chia seeds are a wonderful source of omega-3 fatty acids, as well as B vitamins, iron, calcium and zinc. They’re a nutritious addition to foods for babies 6 months and up. Chia seeds are a great way to include more omega-3s, protein, B vitamins, iron, zinc, and calcium to your baby’s diet. In addition, chia seeds are rich in soluble fiber, helping with digestion and relieving baby constipation.