What is the primary role of B vitamins?

The primary role of B vitamins is to regulate metabolism and energy production. B vitamins are essential in various biochemical processes that convert nutrients from food into energy the body can utilize. For example, B1 (thiamine), B2 (riboflavin), B3 (niacin), B5 (pantothenic acid), B6 (pyridoxine), B7 (biotin), B9 (folate), and B12 (cobalamin) all play critical roles in the metabolism of carbohydrates, fats, and proteins. They help in synthesizing energy from the food we consume, making them crucial for maintaining energy levels and supporting overall health.

While enhancing vision and skin health, supporting immune function, and improving bone density and strength are important health concerns, these functions primarily relate to other vitamins and nutrients rather than the B vitamins specifically. For instance, vitamins A and E are more linked to skin and vision health, while vitamin D and calcium play significant roles in bone health. The B vitamins' distinct focus on metabolism and energy production highlights why this is the correct answer.