Vitamins play a crucial role in energy metabolism as they act as co-factors in various biochemical reactions. Specific vitamins, like those from the B-complex, assist in converting carbohydrates, fats, and proteins into usable energy. For instance, Vitamin B1 (thiamine) plays a key role in carbohydrate metabolism, while Vitamin B2 (riboflavin) and B3 (niacin) are important for fat and protein metabolism. Inadequate vitamin intake can impair energy production, leading to fatigue and decreased performance. Therefore, ensuring adequate vitamin consumption is essential for maintaining optimal energy levels and metabolic function.