First, please avoid strict diets when breastfeeding. Your baby needs you to eat well. Eating right and enough will help in lactation as well. Although following an oat bran diet will definitely boost lactation and provide the much needed iron, you don’t need to worry since there are lots of other foods which have high iron content. I have read about a unique weight loss plan called the Dukan Diet which allows you to eat unlimited quantities from a list of 100+ foods. Spinach, pumpkins, eggs, peppers, soya bean and tofu are very rich in iron and included in the Dukan Diet food list.