Ingabe ukudla i-Vitamin A kunciphisa ubungozi Bomdlavuza Wesikhumba?

Amaphuzu avelele Ekuhlaziyweni kwakamuva kwedatha evela kwabesilisa nabesifazane e-United States, ababambe iqhaza ezifundweni ezimbili ezinkulu, zesikhathi eside zokuhlola, abacwaningi bahlole ubudlelwane obuphakathi kokudla kwe-Vitamin A (Retinol) engokwemvelo kanye nengozi yokudutshulwa ...