What is needed to metabolize protein and for tissue repair, found in foods like broccoli and beef liver?

Riboflavin, also known as vitamin B2, plays a crucial role in the metabolism of proteins, carbohydrates, and fats. It is essential for the production of energy in the body and is involved in the electron transport chain, which is vital for cellular respiration. Additionally, riboflavin is important for tissue repair and growth due to its role in the synthesis of enzymes that facilitate these biological processes.

Foods rich in riboflavin, such as broccoli and beef liver, provide this nutrient in significant amounts, which supports protein metabolism and contributes to the overall process of tissue repair. This nutrient's presence is especially notable in tissues that are rapidly growing or healing, as it aids in the production of new cells and tissues.

The other options, while also being B vitamins, serve different functions in the body. For instance, biotin is primarily known for its role in fatty acid synthesis and energy metabolism but is less directly involved in protein metabolism compared to riboflavin. Niacin, another B vitamin, is important for energy production as well, but it primarily assists in the metabolism of carbohydrates and fats rather than proteins specifically. Thiamin is critical for carbohydrate metabolism and nerve function but does not play the same supportive role in the metabolism