Here are key areas to find books in the library on nutrition topics:
QT 235 -- Diet
QU 145 - 220 -- Vitamins
QU 145 -- Nutrition. Nutritional Requirements
TX 642-840 -- Cooking. (Recipes)
WB 400-449 -- Diet Therapy and Nutrtion Therapy
WT 115 -- Nutrition (Geriatrics)