《临床营养学补充》演示PPT

1、 视黄醇参与视觉形成中的循环过程视黄醇参与视觉形成中的循环过程 干眼病 维生素A缺乏最明显的症状。结膜、角膜上皮组织变性， 泪腺受损分泌减少，结膜出现皱纹，失去正常光泽。患 者常感眼睛干燥、怕光、流泪，发炎，疼痛 毕脱氏斑毕脱氏斑 （ Bitot spots ） 膳食计算: 视黄醇当量视黄醇当量(g)*=1/3Vit A (IU)+1/6-胡萝卜素胡萝卜素(g) RNI 800 g 视黄醇当量视黄醇当量 UL 3000 g 视黄醇当量视黄醇当量 维生素维生素A 4972 438 140 60 57 50 40 Vit D缺乏症 “O”型腿 婴儿脚气病婴儿脚气病 Pork is the rich

2、est source of thiamin, but enriched or whole-grain products typically make the greatest contribution to a days intake because of the quantities eaten. Sunflower seeds and legumes such as split peas are also valuable sources of thiamin. 儿童生长迟缓 口腔粘膜溃疡、地图舌 All of these foods are rich in riboflavin, but

3、 milk and milk products provide much of the riboflavin in the diets of most people. The reactive sites that accept and donate hydrogens are highlighted in white. Leafy green vegetables (such as spinach and broccoli), legumes (such as black beans, kidney beans, and black-eyed peas), liver, and some f

4、ruits (notably oranges) are naturally rich in folate. Most protein-rich foods such as meat, fish, and poultry provide ample vitamin B6; some vegetables and fruits are good sources, too. 皮炎（dermatitis） 舌炎 Protein-rich foods such as meat, fish, poultry, and peanut butter contribute much of the niacin in peoples diets. Enriched breads and cereals and a few vegetables are also rich in niacin the discoverer of scurvy When dietitians say “vitamin C,”