By: Michael Lam, MD, MPH

Reading Tips

For fast reading, scan through the topic headings in BOLD BLACK, important conclusions in BOLD BLUE, and “Must Know” in BOLD RED. To jump to specific sections in this article, click on the respective LINKS in the Table of Contents.

Information presented here is for general educational purposes only. Each one of us is biochemically and metabolically different. If you have a specific health concern and wish my personalized nutritional recommendation, write to me by clicking here.

Fasting sugar is a part of routine blood tests that millions go through every year, as a screening test for your sugar metabolism. It is the best warning sign of adult onset diabetes mellitus, a condition that afflicts over 16 million (12 million diagnosed and 4 million undiagnosed but have the disease)

Normal Reference Standard

Historically, normal reference range is 100-120 mg/dl. In other words, if your fasting blood sugar is 121 or higher mg/dl, you are considered a diabetic. This reference standard was based on research focusing on the incidence of diabetic retinopathy. If your fasting blood sugar is between 100-120, you can consider yourself normal.

Latest Studies

Studies have shown that when your blood sugar is 120 mgHg or higher, you are not only exposed to the risk for diabetic retinopathy, but you have already been exposed to significant risks of heart disease. In a study published in the American Journal of Cardiology (March 2002(1);89(5):596-9), researchers reported that people with a fasting blood sugar level of 100-125 mg/dl had an adjusted nearly 300% increased risk of having coronary heart disease than people with a level below 79 mg/dl. This information was compiled from a cross-sectional study of nearly 2500 people.

The Cleveland Clinic Foundation now uses a fasting blood sugar of 90 mg/dl or higher as a biomarker of coronary heart disease risk. This is consistent with our anti-aging goal to keep the fasting blood sugar no higher than 90 mg/dl, regardless of age (and systolic pressure no higher than 120 mm Hg, regardless of age). These more stringent reference standards are used for the simple reason that they represent the optimum level in order for the body to attain longevity.

Message from Dr. Lam

I hope you have enjoyed reading this article. If you have areas you don’t understand,
or if you have a specific health concern, feel free to write to me by clicking here.


About The Author

Michael Lam, M.D., M.P.H., A.B.A.A.M., is a western trained physician specializing in nutritional and anti-aging medicine. Dr. Lam received his Bachelor of Science degree from Oregon State University, and his Doctor of Medicine degree from the Loma Linda University School of Medicine in California. He also holds a Master’s degree in Public Health. He is board certified by the American Board of Anti-Aging Medicine where he has also served as a board examiner. Dr. Lam is a pioneer in using nontoxic, natural compounds to promote the healing of many age-related degenerative conditions. He utilizes optimum blends of nutritional supplementation that manipulate food, vitamins, natural hormones, herbs, enzymes, and minerals into specific protocols to rejuvenate cellular function.

Dr. Lam was first to coin the term, ovarian-adrenal-thyroid (OAT) hormone axis, and to describe its imbalances. He was first to scientifically tie in Adrenal Fatigue Syndrome (AFS) as part of the overall neuroendocrine stress response continuum of the body. He systematized the clinical significance and coined the various phases of Adrenal Exhaustion. He has written five books: Adrenal Fatigue Syndrome - Reclaim Your Energy and Vitality with Clinically Proven Natural Programs, The Five Proven Secrets to Longevity, Beating Cancer with Natural Medicine (Free PDF version), How to Stay Young and Live Longer, and Estrogen Dominance. In 2001, Dr. Lam established www.DrLam.com as a free, educational website on evidence-based alternative medicine for the public and for health professionals. It features the world’s most comprehensive library on AFS. Provided free as a public service, he has answered countless questions through the website on alternative health and AFS. His personal, telephone-based nutritional coaching services have enabled many around the world to regain control of their health using natural therapies.