A new study by Urashima et al. shows that sensitization to cow’s milk and food allergy, including CMA and anaphylaxis, is preventable by avoiding CMF (cow milk formula) supplementation for at least the first few days of life. Although examined only indirectly in this study, vitamin D supplementation seems to be involved in the sensitization process.
Note to self – here is a list of all vitamin D / allergy related clinical trials following the first case report was Moneret-Vautrin DA, Hatahet R, Kanny G, Ait-Djafer Z. Allergenic peanut oil in milk formulas. The Lancet 1991; 338: 1149. doi: 10.1016/0140-6736(91)92008-p.
1. De Montis G, Gendrel D, Chemillier-Truong M, Dupont C. Sensitisation to peanut and vitamin D oily preparations. The Lancet 1993; 341: 1411. doi: 10.1016/0140-6736(93)90976-N.
2. De Montis G, Gendrel D, Chemillier-Truong M, Dupont C. [Peanut sensitization and oily solution vitamin preparations]. Arch Pediatr 1995;2(1):25-8. doi: 10.1016/0929-693x(96)89804-6.
3. Rueter K, Jones AP, Siafarikas A, Lim EM, Bear N, Noakes PS, et al. Direct infant UV light exposure is associated with eczema and immune development. J Allergy Clin Immunol 2018; in press, doi: 10.1016/j.jaci.2018.08.037.
4. Rosendahl J, Pelkonen AS, Helve O, et al. High-Dose Vitamin D Supplementation Does Not Prevent Allergic Sensitization of Infants. J Pediatr. 2019 Jun;209:139-145.e1. doi: 10.1016/j.jpeds.2019.02.021
The Urashima study is accompanied by a valuable editorial of George du Toit and Kari Nadeau
There is currently a lack of consensus among national allergy societies .. Although the EAACI3 and American Academy of Allergy, Asthma and Immunology (AAAI) currently recommend the use of hypoallergenic formulas in infants at high risk of allergy, the Australian Society of Clinical Immunology and Allergy does not. The EAACI and the AAAI are likely to reconsider their guidelines because results of more re- cent studies have been contradictory. … Guidelines in the United States and United Kingdom recommend routine vitamin D supplementation in all breastfed infants, whereas guidelines in Australia recommend supplementation only in breastfed infants at high risk of vitamin D insufficiency.