This cookbook’s primary objective is to be a guide for proper nutrition. The title, What to Eat to be Healthy: The General Principles of Proper Nutrition in Everyday Life reflects that the content will be focused on how to be healthy and incorporate nutritional components into the diet on a daily basis. Created around 1937 by Frederick F. Tisdall and published in Toronto by the Canadian Life Insurance Officers' Association, the book explains that some nutrients are obtained through the average diet and provides information for each nutrient that is not. Within its sixteen pages, the cookbook identifies and explains the importance of essential elements in food, including vitamins, minerals, proteins, fats, and carbohydrates, and provides examples of foods rich in each nutrient. There is a dedicated page that outlines what each nutrient is, where it can be found, how to obtain an appropriate daily amount, and describes the health consequences of diets that lack or exceed the nutritional recommendations. The cookbook also recognizes that different age groups need to meet different nutritional standards. Time of year and the seasons are also addressed; for instance, it outlines a basic diet for health that meets the daily recommended nutrients with specialized recommendations for the winter months when fresh foods are more limited. The book then describes how to prevent tooth decay, other health risks, and physical deformities that may result from an incomplete diet. This cookbook is a thorough guide for proper nutrition at the time with information that explains to readers why it is important to eat healthy foods.