How much carbohydrate is regarded as the RDA or AI?

The Recommended Dietary Allowance (RDA) for carbohydrates is set at 130 grams per day for adults and children aged one year and older. This amount is established based on the minimum level of carbohydrate intake needed to provide adequate glucose to the brain and to fuel bodily functions effectively. Carbohydrates are the body's primary source of energy, and 130 grams is considered sufficient to meet the energy needs of the brain, which relies heavily on glucose for its metabolic functions.

This value takes into account the general preference for carbohydrate sources in a typical diet, while also allowing for healthy variations in food choices. The provision of a minimum carbohydrate intake recommendation aims to support overall health and adequate brain function without endorsing excessive intake that could lead to health issues.