A recent study published in Microorganisms suggests that starch, like sugar, may contribute to cavities depending on an individual’s genetic makeup. Researchers examined how the AMY1 gene, which codes for salivary amylase, affects the oral microbiome when exposed to starch. They found that individuals with a high AMY1 copy number experienced shifts in bacterial composition, with certain bacteria associated with tooth decay and gum disease increasing or decreasing.
These findings suggest that individuals with more AMY1 copies may just need to be more mindful of oral hygiene after consuming starches. The study also highlights how human populations with a history of high starch consumption have evolved more copies of AMY1, which influences bacterial growth in the mouth and potentially affects oral health outcomes.
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