The Solgar B-Complex with Vitamin C Stress Formula (ID: 130307) is a popular supplement designed to combat the effects of stress and promote overall well-being. Its strength lies in the complementary combination of a full spectrum of B vitamins with a substantial 500mg of Vitamin C. B vitamins are essential co-factors in numerous metabolic processes, particularly energy production and neurological function, making them vital for combating fatigue and supporting brain health. Vitamin C adds powerful antioxidant protection and supports immune function, both crucial for a body under stress. Solgar's strong brand reputation further assures consumers of the product's quality. However, the formulation, while balanced, uses moderate doses for some B vitamins (e.g., 10mg for B1, B2, B6) which might be considered less potent than 'B-100' formulas often sought for more intense support. The 100mg Niacin (B3) can also cause a temporary, harmless flushing sensation for some users, which is a common side effect of this form of niacin. At 22 cents per serving, this particular size is less cost-effective than its larger counterpart or other competitive brands, which impacts its overall value score.