What is the AMDR for carbohydrate intake in adults?

• A. 20-35%
• B. 45-65%
• C. 10-25%
• D. 5-15%

Answer: (B)

Carbohydrates are meant to be the primary energy source in a balanced adult diet, so the AMDR for adults places carbohydrate energy at 45-65% of total calories. This range ensures you get enough energy while leaving room for fats and proteins, and it supports intake of fiber and micronutrients from carbohydrate-rich foods like fruits, vegetables, whole grains, and legumes. For example, on a 2000 kcal day, 45-65% from carbs equals about 900-1300 kcal, or roughly 225-325 grams of carbohydrate.

Other ranges aren’t appropriate for the general population. Numbers like 20-35% reflect the fat AMDR, not carbohydrates, and very low ranges such as 10-25% or 5-15% would not provide sufficient energy or fiber for most adults.