A study that makes sense.
The concept is called desensitization.
However I added a comment by a physician to emphasize that some people just can’t help themselves.
He says eating nuts is “healthier” and that might be a factor. What a crock–eating nuts is “healthier” like than what?
However allergists will tell you that exposure to allergens will desensitize the immune system. If fact anyone who has allergies that are significant is advised to get desensitization shots so this study merely shows that in utero exposure to peanut allergens by mom eating peanuts makes for less peanut sensitivity.
Peanut Consumption During Pregnancy Lowers Risk of Peanut Allergy in Offspring
JAMA Pediatr 2014 Feb 01;168(2)156-162, AL Frazier, CA Camargo, S Malspeis, WC Willett, MC Young
Research · March 04, 2014
There has been a significant increase in childhood prevalence of peanut or tree nut (P/TN) allergies. In this prospective cohort study (part of the ongoing Nurses’ Health Study II and Growing Up Today Study 2), the offspring of mothers who documented their peripregnancy dietary intake were assessed for P/TN allergies. Of 8205 children, 140 cases of P/TN allergies were documented. Offspring of nonallergic mothers who consumed more P/TN during the peripregnancy period were statistically less likely to develop P/TN allergies than children of mothers who consumed less (P = .004).
This study indicates that early allergen exposure (even during the peripregnancy period) can lower the risk of childhood food allergies.
David Rakel MD, FAAFP
The Earlier the Better
There has been controversy in the literature about the timing of maternal nut intake and associated allergy in their offspring. This study did not look at when these foods were given to the child but when the mother consumed them. It appears that those mothers who ate the most peanuts and tree nuts around the time of pregnancy had offspring with the least amount of allergy to these foods. This suggests that early allergen exposure increases the likelihood of tolerance, reducing the child’s risk. It should be noted that those mothers who ate more peanuts and tree nuts also ate a more nutritious diet overall, with more vegetables and fruit. This may suggest that eating a healthier diet may also be playing a factor in the child’s allergy risk.