"Fruits and vegetables are essential to the breastfeeding diet," says Gina Solomon, M.D., M.P.H., a scientist at the Natural Resources Defense Council. "Organic, pesticide-free produce is best, but if you can't find organic, rinse well and enjoy." Should your budget for organic foods be limited, she suggests buying organic versions of the produce most often treated with pesticides: berries; stone fruits (peaches, cherries, apricots, nectarines, plums, etc.); leafy greens; and imported grapes. Domestic (in season) grapes are OK.