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A marathon runner needs quick fuel during the race. The best macronutrient is:

ACarbohydrate
BCarbon fibre
CCartilage
DCaramel wax
Answer & Solution
Correct answer: A. Carbohydrate
1. Energy must arrive fast during exercise. 2. Fat is far too slow for that. 3. So carbohydrate is best. _Source: OpenStax Nutrition for Nurses, Chapter 2, Macronutrients._
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