This 1 Blood Test Predicts Heart Attacks Better than Cholesterol
In a Nutshell
A one-hour oral glucose tolerance test reading of 155 mg/dL or higher predicts diabetes, heart attacks, strokes, and other complications far earlier than fasting glucose or A1C. The International Diabetes Federation has adopted this threshold as pre-diabetes (and 209 mg/dL as diabetes), yet standard guidelines still rely on tests that miss metabolic disease for 5-7 years. At-home 75-gram glucose testing can identify this risk before arterial damage occurs.
These notes were generated by AI and may contain inaccuracies.
The episode presents a "Dr. Brewer, you were right" discussion about metabolic disease as a major driver of heart disease, heart attacks, and strokes. The measurement approach for metabolic disease is described as fundamentally wrong, requiring a specific test with proper interpretation that most doctors perform incorrectly.
The American Diabetes Association guidelines diagnose diabetes through:
- Fasting glucose of 126 or higher
- A1C measurement
- Oral glucose tolerance test where blood sugar reaches 200 at two hours, confirmed twice
These metrics result in diagnosis 5-7 years later when significant plaque has already developed and heart attack/stroke risk is elevated.
Dr. Brewer has been advocating for more aggressive standards than conventional guidelines. The International Diabetes Federation has now adopted his approach of examining one-hour oral glucose tolerance test numbers. Research supporting this approach spans over 15 years, led by Dr. Bergman and the diabetes foundation.
155 mg/dL at one hour on OGTT indicates pre-diabetes with significant disease risk leading to heart attack, stroke, blindness, and kidney disease.
209 mg/dL at one hour indicates full diabetes diagnosis according to the International Diabetes Federation.
Standard diabetes testing relies on fasting glucose and A1C, which may appear normal while missing underlying metabolic disease. The oral glucose tolerance test measures glucose and insulin levels at fasting, one hour, and two hours after consuming 75 grams of pure sugar. This journey of blood sugar and insulin response cannot be detected by other tests.
Blood sugar should not exceed 140 mg/dL after eating sugar, as crossing this threshold causes arterial damage. Standard physiology textbooks do not address this concern, contributing to why doctors lack knowledge about proper diagnosis.
A 2024 review found that one-hour post-load glucose of 155 mg/dL in people with normal glucose tolerance tests (where one-hour reaches 145 and two-hour returns below 100) is highly predictive of:
- Type 2 diabetes progression
- Micro and macrovascular complications
- Sleep apnea
- Cystic fibrosis-related diabetes
- Metabolic dysfunction-associated steatotic liver disease (fatty liver)
- Mortality in individuals with risk factors
One-hour post-glucose of 209 mg/dL is diagnostic of type 2 diabetes.
Research on one-hour OGTT has been ongoing for 15+ years, published in sources including Science Direct, International Diabetes Federation statements, Journal of Diabetes Research and Clinical Practice, PubMed, and Frontiers in Endocrinology. The American Diabetes Association has not yet adopted these findings.
The oral glucose tolerance test is difficult to perform as it requires three blood draws over time and drinking the glucose solution, leading to low compliance. Previous American Diabetes Association research acknowledged OGTT detects 90% of cases compared to 50% for A1C and 70% for fasting glucose.
75-gram glucose powder is available on Amazon for at-home testing. Alternative options include using Mott's applesauce, which contains sufficient sugar for testing purposes.
Studies supporting one-hour OGTT have been conducted across multiple locations including San Antonio, New York, multiple US cities, Malmo Sweden, Italy, and Germany, demonstrating consistent findings across different populations.
A new AI tool called drbrewer.ai provides root cause approach answers to health questions, lab result interpretation, medication and supplement guidance based on Dr. Brewer's teaching rather than generic internet information. The tool helps users understand the bigger picture for discussions with healthcare providers without providing diagnoses or prescriptions.
Traditional medicine considers diabetes as "residual risk" after controlling LDL cholesterol and ApoB, despite diabetes being associated with eight times increased risk. Recent Novartis research showed that lowering Lp(a) did not reduce heart attacks, suggesting metabolic disease may be the primary rather than residual risk factor.
The correct oral glucose tolerance test procedure:
- Eight hours of fasting (typically overnight)
- Initial blood sugar test
- Consume 75 grams of glucose
- Blood draw at one hour for glucose measurement
- Standard includes at least two-hour measurement
A one-hour reading of 200+ indicates probable diabetes. The International Diabetes Federation now recognizes 155 at one hour as significant pre-diabetes requiring arterial monitoring, and 209 at one hour as full diabetes diagnosis.
Some patients experience reactive hypoglycemia where blood sugar rises at one hour, then drops to 60s or 50s by the third hour. This indicates insulin overreaction and insulin resistance, representing another sign of metabolic disease even without reaching 200 mg/dL.
Heart attack, stroke, blindness, and kidney disease risks can be removed through proper identification and management of metabolic disease. The information is presented as actionable and capable of changing health outcomes when properly understood and applied.
Metabolic disease can exist in lean individuals. Japanese populations demonstrate this phenomenon where heart attacks remain the second leading cause of death despite different dietary patterns, showing that external thinness does not guarantee absence of internal metabolic disease.
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