Which vitamin has a daily value of 19%?

Riboflavin, also known as Vitamin B2, plays an essential role in energy production and the metabolism of fats, drugs, and steroids. It is a part of the B vitamin complex and is necessary for the maintenance of healthy skin, eyes, and nerve functions. The daily value of 19% indicates that this vitamin is a significant part of the dietary reference values established to help people understand how much of a nutrient they receive from their diet in relation to the overall daily recommendation.

When evaluating the other choices, Vitamin B-6, Magnesium, and Phosphorus have different daily value percentages and functions in the body. Vitamin B-6 is pivotal for protein metabolism and cognitive development, while Magnesium is crucial for muscle function and energy production, and Phosphorus is essential for bone health and energy transfer in cells. Each of these nutrients contributes significantly to overall health, but they do not share the same daily value percentage as Riboflavin.