Nutritional and haematological status of Chinese farmers: the influence of 13.5 months treatment with riboflavin, retinol and zinc

acide ascorbique acido ascorbico additif alimentaire aditivos alimentarios agriculteur agricultores ascorbic acid blood composition china chine composition du sang estado nutricional farmers femme food additives haemoglobin hemoglobina hombres homme men mujeres nutritional status retinol riboflavin riboflavina riboflavine tocoferoles tocopherol tocopherols women