Berkhout A M, Hoen J
Tijdschr Gerontol Geriatr. 1985 Feb;16(1):3-7.
The Dutch Nutrition Council recommends an average daily intake of at least 50 mg of vitamin C. In a Dutch centre for nursing and rehabilitation this amount in the food as consumed by 272 patients and as served by the kitchen was calculated to be below 20 mg. About half of the patients consumed additional food - rich in vitamin C - each day either bought or acquired. Symptoms pertaining to the disease scorbut, were observed in a considerable number of these patients, but these may also be caused by other diseases. Patients completely dependent on food served by the central kitchen, had very low values of plasma vitamin C, in contrast to patients who used extra fruit each day. Centres for nursing and rehabilitation are recommended to serve 150 ml vitamin C-rich fruit juice each day, thereby combining the advantages of providing enough fluid intake and preventing obstipation.
荷兰营养委员会建议维生素C的每日平均摄入量至少为50毫克。在荷兰一家护理与康复中心，经计算，272名患者所食用的由厨房提供的食物中维生素C含量低于20毫克。约一半患者每天食用额外购买或获取的富含维生素C的食物。在这些患者中，相当一部分出现了与坏血病相关的症状，但这些症状也可能由其他疾病引起。与每天食用额外水果的患者相比，完全依赖中央厨房提供食物的患者血浆维生素C值非常低。建议护理与康复中心每天提供150毫升富含维生素C的果汁，这样既能保证足够的液体摄入，又能预防便秘。
