Session 8 covers some essentials of nutrition for adding muscle definition and mass: macronutrients, proteins, fats, how much to eat and when, losing fat, maintaining muscle, the importance of eating of enough carbohydrates, and year-round consistency.
Joe Weider's Bodybuilding Training System, Session 8: Nutrition & Diet (1994) is currently not available on any services.
Weider Health and Fitness