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si·to·sta·nol | \ ˌsī-tō-ˈstan-ᵊl 
, sə-ˈtäs-tə-ˌnȯl \
, sə-ˈtäs-tə-ˌnȯl \Medical Definition of sitostanol
: a plant sterol C29H52O that is derived from sitosterol and has been shown to reduce serum cholesterol by inhibiting cholesterol absorption
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