Ososayensi bakufakazisile lokho amathuba okuba nomdlavuza webele anciphe kakhulu kulabo besifazane abadla i-ascorbic acid (vitamin C) esikhathini eside. Ucwaningo, olwasungula lesi senzo futhi olwathatha iminyaka engu-12, lwaluthinta abesifazane abangama-3405 abatholakala benomdlavuza webele ongahlaseli.
Ngesikhathi kwenziwa ucwaningo, umdlavuza wadlula nemiphefumulo yabantu abayi-1055, abangu-416 kubo babulawa ngumdlavuza webele. Ukuhlaziywa kokudla kwezihloko, futhi ngaphezu kwalokho, ukuthatha izithasiselo kukhombisile lokho basinda ngemuva kokuxilongwa okubulalayo, labo besifazane okuthi, ngaphambi kokutholakala komdlavuza, bafake ngokuhlelekile ekudleni kukavithamini C… Futhi konke ukudla kuqukethe i-ascorbic acid.
Khumbula ukuthi iyingxenye yazo zonke izithelo ezisawolintshi - amawolintshi, ama-tangerines nolamula. Futhi uphayinaphu, utamatisi, ugarliki, ama-strawberry, umango, i-kiwi nesipinashi, iklabishi, ikhabe, upelepele wensimbi nezinye izithelo nemifino. Ukusetshenziswa kwawo, kanye novithamini osesimweni sawo esihlanzekile, njengoba kukhonjisiwe kulolu cwaningo, kunciphisa izinga lokufa kweziguli ezinomdlavuza ngama-25%. Noma ngabe ingxenye yansuku zonke yesengezo ingu-100 mg kuphela.