Common mistakes around kefir often involve hygiene, fermentation time, and milk quality. Many people use raw milk without controlling bacterial load, which can introduce unwanted microbes. Using metal utensils (e.g., spoons or strainers) can damage the sensitive kefir grains – glass, wood, or plastic are better. Another mistake is over-fermenting: leaving kefir for more than 24–48 hours at room temperature makes it extremely sour and potentially irritating to the stomach. Also, kefir is not pasteurized, so immunocompromised individuals should be cautious. Some mistakenly believe kefir can replace a balanced diet or cure diseases – this is not supported by evidence. Health claims are mostly based on mechanistic or observational studies, not robust human trials. Caveat: For gut health concerns, consult a doctor.
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