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However, individual responses vary significantly based on baseline nutrition, dietary sources of B12, and genetic factors that influence nutrient metabolism

However, serious side effects such as allergic reactions or heart failure in individuals with heart disease are rare but possible

doi: 10.1001/jama.2010.490

A good postnatal supplement should contain a variety of vitamins, minerals, and other nutrients, including: omega-3s folate choline iron selenium vitamin A vitamins B1, B2, B6, B12 vitamin C vitamin D vitamin E You may not be able to find a supplement that contains everything you need, especially when breastfeeding, so you may have to take several supplements