Amino acids are used as the primary energy source when carbohydrates are insufficient.

Amino acids are used as the primary energy source when carbohydrates are insufficient.

• A. Amino acids
• B. Carbohydrates
• C. Fats
• D. Proteins

Answer: (A)

When carbohydrates are limited, fats become the primary energy source. Stored triglycerides are broken down into fatty acids that fuel most tissues, especially during fasting or low-carb conditions. The body still needs glucose for certain cells (like brain and red blood cells), so it makes glucose via gluconeogenesis using glycerol, lactate, and some amino acids. However, amino acids are not the main energy suppliers; they’re mainly preserved for tissue maintenance and used for glucose production as needed. Only with prolonged fasting or severe energy shortage do amino acids contribute a larger share of energy. So the statement is not accurate because fats, not amino acids, provide the primary energy when carbohydrates are insufficient.

When carbohydrates are limited, fats become the primary energy source. Stored triglycerides are broken down into fatty acids that fuel most tissues, especially during fasting or low-carb conditions. The body still needs glucose for certain cells (like brain and red blood cells), so it makes glucose via gluconeogenesis using glycerol, lactate, and some amino acids. However, amino acids are not the main energy suppliers; they’re mainly preserved for tissue maintenance and used for glucose production as needed. Only with prolonged fasting or severe energy shortage do amino acids contribute a larger share of energy. So the statement is not accurate because fats, not amino acids, provide the primary energy when carbohydrates are insufficient.