U.S. doctors online nowAsk doctors free
A 42-year-old member asked:

Can low carb diet use your muscle or fat for energy?

1 doctor answer1 doctor weighed in
Dr. David Sneid
Endocrinology 42 years experience
All the same: Your body uses mostly carbohydrate for energy, and then some fat is broken down to replenish lost calories if you're losing weight. Muscle is only broken down in starvation, cancer, severe disease or long-term illness.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated May 28, 2013


Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.