Blood Tests Doctors Don’t Run - But Could Save Your Life
Shawn Baker MDPublished on January 16, 2026
Summary authored by editor@wellifi.com
TLDR Summary
To ensure optimal health on a carnivorous or low-carb diet, it's essential to monitor specific health markers such as kidney function, blood lipids, iron storage, insulin resistance, thyroid function, and cardiovascular health. Regular assessments can help maintain well-being and prevent potential health issues.
Key Points
- Monitor kidney function with a cystatin C test for reliable results.
- Use advanced lipid panels to assess blood lipids accurately.
- Ferritin tests can indicate iron storage and inflammation levels.
- Insulin resistance can be evaluated with HOMA-IR and triglyceride glucose index.
- Check T3 and T4 levels alongside TSH for a complete view of thyroid health.
- Consider a coronary artery calcium scan for cardiovascular risk assessment.
Essential Health Measures for a Carnivorous Diet
As more people consider adopting a carnivorous or low-carb diet, it becomes crucial to monitor specific health markers to ensure optimal well-being. The following five, and possibly six, measures can help anyone pursuing a ketogenic or carnivorous diet to assess their health effectively. Not only are these tests valuable for carnivore dieters, but they can also provide essential insights for anyone interested in low-carb lifestyles.
1. Assessing Kidney Function
Concerns about high protein diets impacting kidney function are common. To accurately assess renal function, a cystatin C test is recommended over the traditional serum creatinine test. Unlike creatinine, cystatin C is less affected by muscle mass or dietary protein intake, making it a more reliable indicator of kidney health.
2. Evaluating Blood Lipids
Monitoring blood lipids is essential, particularly for those on low-carb diets. An advanced lipid panel is recommended as it measures particle number and size, providing a more detailed picture of cardiovascular health. Additionally, tests like the lipoprotein insulin resistance score (LPIR) can help assess the relationship between insulin resistance and lipid levels, which is crucial for understanding cardiovascular risks.
3. Checking Iron Storage and Inflammation
A simple ferritin test can indicate iron stores in the body and may be associated with inflammation levels. Elevated ferritin levels can signify high inflammation or insulin resistance, so interpretation by a knowledgeable healthcare provider is advisable.
4. Understanding Insulin Resistance
Insulin resistance can be assessed using several methods, including:
- HOMA-IR score: Calculated from fasting insulin and glucose levels.
- Triglyceride glucose index: Derived from fasting triglycerides and glucose.
- Waist-to-height ratio: A practical measurement that can indicate insulin sensitivity. Ideally, your waist should be less than half your height.
Monitoring fasting insulin levels can also provide insight; levels above 20 are concerning, while levels between 3-8 are generally acceptable.
5. Thyroid Function Testing
Thyroid health is another critical area to monitor. While many physicians only check TSH levels, obtaining T3 and T4 tests can offer a more comprehensive view. In some cases, low-carb diets may temporarily suppress T3 levels, impacting thyroid function.
6. Cardiovascular Health Assessment
For individuals over 40, a coronary artery calcium (CAC) scan is advised. A score of zero generally indicates a low risk for cardiovascular disease within the next 5-10 years, although it does not eliminate all risks.
Conclusion
Maintaining health during a carnivorous or low-carb diet requires vigilance and regular assessments. These measures provide crucial insights into kidney function, lipid levels, iron storage, insulin resistance, thyroid health, and cardiovascular status. For personalized support and resources, consider consulting with healthcare providers who understand low-carb physiology and can help guide you on your health journey.
Taking proactive steps towards health can lead to a more vigorous and enjoyable life. Remember, achieving health is about more than diet—it's about a holistic approach to well-being.