Wani bincike mai ban mamaki da aka gudanar a shekarar 2009 ya gano cewa haɗin polyphenol na shayin kore da hasken ja (670 nm) yana haifar da tasirin sabunta fata, rage kuraje da farfado da ƙarfin ƙwayoyin. Masana sun tabbatar da cewa shafa auduga da aka jika da shayin kore na mintuna 20 kafin a yi amfani da LED ɗin ja na iya rage radadin oxidative stress, ƙara aiki mitochondria da ba da mafita mai sauƙi ga tsofaffi.
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