Well... my guess is he may not be... today I tried the PrimaCare ONE pre-natal vitamin (took it round 9 a.m.) and he fussed at the breast terribly (for the first time in a LONG time) at his 6:30 p.m. feed. Here are the "inactive" ingredients... D&C Red No. 33, ethylvanillin, FD&C Blue No. 1, gelatin, glycerine, hydrogenated vegetable oil, lecithin, methylparaben, propylparaben, soybean oil, titanium dioxide, vegetable shortening, and yellow beeswax. Is that too soon for the soybean oil and lecithin to affect him? Is vegetable oil a concern too? Is fussing at the breast even a symptom of an allergy/intolerance?