Endocrinology (including Diabetes)/Fasting Glucose readings


I have been following a low carb diet for about 5 months to lose weight and bring down my blood sugar.  I am not diabetic, but my A1C was 6.3 and my doctor wanted me to bring that down.  My last A1C was 5.9, so I am happy that it seems to be working.  I have also lost 20 pounds.  But, my question is - my fasting blood sugar number is still in the 120s every morning.  My number after I eat is between 85 and 100, so I know that's really good.  Is there anything I should be doing to get the fasting number to come down?  Or is the A1C number more important then that higher fasting number?
I am confused as to why my post prandial numbers are getting better and better, and my fasting is getting worse.  It used to run between 100 and 110.  So I don't like seeing the 120s.
Thanks, Linda


I think you are experiencing an issue that a lot of people have.  Have you been able to lose weight as well, or are your A1Cs the only thing that have gone down?  There are quite a few reasons why morning fasting levels can be elevated, but it is concerning that yours have gone up rather than down.  I only know of a couple of ways to lower them.

One is with a diabetes/prediabetes medication called metformin that targets the liver and makes it release less glucose overnight.  Another thing people have tried is melatonin supplements at bedtime; you can buy these over-the-counter at many stores.  A third is drinking a glass of wine or an alcoholic beverage in the evening as alcohol interferes with normal liver function and lowers its glucose release--however, alcohol has calories and may be counterproductive to your attempts to lose weight.  A final thing can be losing some of the fat you have stored deep inside your abdomen (called visceral fat), which is best lost through regular exercise.  You may want to try one or all of these things, depending on your personal preferences.

Hope this helps.  Sheri

Endocrinology (including Diabetes)

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Sheri Colberg, PhD


I am an exercise physiologist with a PhD who specializes in diabetes--as such I CANNOT answer general questions about other endocrine problems as I am neither an expert in all areas of endocrinology nor am I a medical doctor. My expertise lies in answering questions about diabetes (of any type) and physical activity, so please limit your questions to those areas. I can help you if you want to begin exercise or if you're already a diabetic athlete, and I am prepared to respond to questions about physical activity to which even your diabetologist may not know the answer. I can give suggestions about changes in your diabetic medications that differing types and intensities of exercise may necessitate, but I will have to refer you to your regular health care team to get final approval to make such changes. I can also answer questions about physical fitness, exercise metabolism, prediabetes reversal, and prevention of type 2 diabetes and diabetic complications.


I have both personal and professional experience in the areas of diabetes and exercise/physical activity. On a personal level, I have had type 1 diabetes since 1968, and I have been an avid exerciser since I was a child. Professionally, I have been conducting clinical studies on diabetes and exercise since 1992, largely with funding from the American Diabetes Association. I am also the author of 8 books related to diabetes, exercise, and more: The Diabetic Athlete (2001), Diabetes-Free Kids (2005), The 7 Step Diabetes Fitness Plan (2006), 50 Secrets of the Longest Living People with Diabetes (2007), The Science of Staying Young (2007), Matt Hoover's Guide to Life, Love, and Losing Weight (2008), Diabetic Athlete's Handbook (2009), and Diabetes? No Problema! (2009).

I am a Fellow of the American College of Sports Medicine, a professional member of the American Diabetes Association (and professional volunteer for the ADA), and a former member of the Board of Directors of the Diabetes Exercise & Sports Association.

I have published research and review articles in the following journals and magazines: Diabetes Care, Diabetes, Journal of Diabetes & Its Complications, Diabetes Self-Management, Medicine & Science in Sports & Exercise, Journal of Applied Physiology, The Physician and Sportsmedicine, Journal of Clinical Investigation, International Journal of Obesity, FASEB Journal, The Diabetes Educator, Journal of Physical Education, Recreation, and Dance, Clinical Exercise Physiology, Clinical Diabetes Reviews, Insulin, ACSM's Health & Fitness Journal, Biomechanics, On the Cutting Edge, Diabetes Technology & Therapeutics, Microvascular Research, Drug Benefit Trends, ACSM Certified News, Diabetes Health, SportEX Health, Diabetes Focus, Diabetes In Control, dLife-For Your Diabetes Life, Pediatrics for Parents, and My TCOYD (Taking Control of Your Diabetes) Newsletter. I have also been interviewed in myriad other magazines, such as Men's Health, Men's Fitness, Diabetes Forecast, Countdown Magazine, Joe Weider's Muscle & Fitness, Health, Tidewater Parent, Barron's News, Diabetes New Day, and Newsweek International.

I have an undergraduate degree (1985) from Stanford University, a Master's degree in exercise physiology (1987) from the University of California, Davis, and a Ph.D. (1992) from the University of California, Berkeley, in the same field. I also spent two years in an NIH-funded postdoctoral research position in endocrinology (studying obesity, diabetes, metabolism, and exercise) at the University of Pittsburgh School of Medicine (1993-1994).

Awards and Honors
Fellow, American College of Sports Medicine (FACSM) - 1996 Old Dominion University Darden College of Education Young Investigator Grant Award 2003 Honor Society of Phi Kappa Phi, Old Dominion University Chapter 2004-Present Great Women of the 21st Century by the American Biographical Institute 2005 Edition Old Dominion University Darden College of Education Largest Research Grant Award 2006 Old Dominion University Darden College of Education Publications Award (for greatest number) 2006 Saint Louis University, The Max K. Horwitt Memorial Lecture Distinguished Lectureship Award 2008 Old Dominion University Darden College of Education Publications Award 2009 Old Dominion University Darden College of Research Grants Award 2009

Past/Present Clients
I have consulted for numerous groups, including Can-Am Care, Numera|Social, California Commission on Peace Officer Standards and Training(about candidates with diabetes), Animas Corporation (an insulin pump company), Therasense, Inc. (makers of the Freestyle blood glucose meters), Council of Healthcare Advisors, and the City of Chesapeake (Virginia) Health Department.

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