What is the recommended daily allowance (RDA) of vitamin C for adults?

The recommended daily allowance (RDA) of vitamin C for adults is 90mg/day. This guideline is established to ensure that individuals receive adequate amounts of this essential nutrient, which plays a crucial role in various physiological functions, including collagen synthesis, antioxidant protection, and enhancing the absorption of iron from plant-based foods.

Vitamin C is also vital for the immune system and helps in the maintenance of skin health. While some lower amounts, like 50mg or 75mg, may contribute to basic nutritional needs, they do not provide the full benefits associated with the optimal intake of 90mg. Similarly, while a higher amount like 100mg might be seen as beneficial, it exceeds the established RDA and may not be necessary for the average adult diet. Therefore, 90mg/day represents a balanced guideline to support overall health effectively.