Common mistakes around kefir for children: First, not all kefir is equal – many commercial products are loaded with added sugar or contain few live cultures, reducing health benefits. Second, overconsumption (more than 100–150 ml daily) can cause bloating or diarrhea in young children, as their gut flora needs time to adapt. Third, lactose intolerance or cow’s milk protein allergy is overlooked – kefir has less lactose than milk but is not lactose-free. Fourth, parents expect immediate effects on immunity or digestion, but gut microbiota regulation takes weeks to months. Fifth, genetic factors like the bitter taste receptor (TAS2R38, rs713598) can affect acceptance – children with the ‘bitter taster’ variant may reject kefir. Evidence for probiotic benefits in children is moderate but strain-specific. Safety note: In immunocompromised children or after antibiotics, consult a pediatrician before introducing kefir.
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