Soy is an ingredient that is allergenic, but there are other reasons why soy could be considered problematic. In excess, it's been linked to issues such as cognitive impairment, Alzheimer's disease risk, thyroid problems, increased breast cancer risk, interference with menstrual cycles and other health problems. More studies are needed about these possible effects. Studies are also underway regarding phytoestrogen intake in infants who consume soy formula.
Soy formula has long been the first choice for babies who experience problems with cow's milk formula or who are lactose intolerant, but now many doctors advise that babies be given lactose-free formulas that aren't soy based or be given hydrolyzed protein formulas like Alimentum or Nutramigen.
Dr. William Sears in The Baby Book recommends against soy formula as a first choice for many reasons including that "30-50 percent of infants who are allergic to cow's milk protein are also allergic to soy protein," and that "giving an infant soy at a young age, when intestines are more permeable to allergens, may predispose the child to soy allergies later on, even as an adult." So, if problems arise with cow's milk formula, know that soy is not your only option.
If There's No Family History of Allergies
Offer your child soy in moderation at around 8-9 months of age. Tofu is a good start as babies like the texture and it doesn't have a heavily beany flavor like some soy products. It's also less gas producing, which is a bonus for sensitive tummies.
If You Have Allergies in the Family
Wait to give your child anything containing soy until he is 1 year of age. Foods that contain soy include soy milk, edamame, soy sauce, tamari, tofu, miso and tempeh.
Whether or not you have a history, the first time you introduce soy, be sure to watch for the signs of an allergic reaction (hives, difficulty breathing or asthma symptoms, swelling of the mouth or throat, vomiting or diarrhea and loss of consciousness), know how to respond and be ready to call 9-1-1 immediately.
Do you have a question you'd like to see answered? You can send your questions to me at babyparenting.guide@about.com and I will answer them here on the site.
