Na dogon lokaci da aka dafa, polyphenols da mahimman mai da ke cikin shayi, suna fara yin oksidis, wanda ke shafar dandano, launi da ƙimar abin sha kuma yana rage ƙima mai gina jiki kuma yana lalata bitamin.
Kuma yanzu masana kimiyya sun sanya sunan lokaci, wanda shine mafi kyau ga shayin shayi. Yayi daidai da minti 3.
An saka shayi a cikin ruwan zãfi tsawon wannan lokacin masu binciken guba sun yi bincike. Kuma sun samo samfuran ƙarfe masu nauyi, musamman gubar, aluminium, arsenic da cadmium. Masu bincike sun yi imanin cewa karafa sun shigo cikin ganyen ne saboda gurɓacewar ƙasa, galibi saboda gonakin da ke kusa da gurɓata tashoshin wutar da ke amfani da kwal.
Ta yaya abubuwa masu cutarwa zasu iya shiga cikin abin shan ku, ya dogara da lokacin da ake hada shayin. Don haka idan jakar tana cikin ruwa na mintina 15 zuwa 17, matakin abubuwa masu guba yakan tashi zuwa mara lafiya (misali, a wasu samfuran adadin yawan sinadarin alminiyon ya kai 11 449 µg / l lokacin da adadin izini na yau da kullun ya kai 7 000 mg / l).
Don haka bai kamata ku shayi shayi bisa ka'idar “yi kuma ku manta ba”, saboda mintuna 3 sun isa abin sha mai daɗi, kuma kowane minti fiye da haka, abubuwa da yawa da ba'a buƙata sun shiga cikin Kofinku.
Ari game da kallon kallon shayi a cikin bidiyon da ke ƙasa:
