The thing with solids and iron, is that breastmilk provides enough iron for much of the first year. If solids replace milk too early than iron levels actually drop! The iron in breastmilk is more readily absorbed than iron from any other source. Next best is the iron in its natural from foods. Only about 5% of the iron in fortified foods such as baby cereal is absorbed by the baby. So BLS should actually be better for iron levels!