I-Vitamin C, eyaziwa nangokuthi i-ascorbic acid, iyivithamini encibilikayo emanzini ebaluleke kakhulu empilweni yomuntu.Itholakala ekudleni okuningi, njengezithelo ezisawolintshi (njengamawolintshi, ulamula), ama-strawberry, imifino (efana notamatisi, upelepele obomvu).