Unlocking Longevity: 6 Key Blood Test Insights You Can't Ignore

Daniesha Govender
By Daniesha Govender
a woman with long dark hair smiling at the camera
Edited by Kelly Hendrickse

Updated December 10, 2023.

A doctor in a lab coat holding a tube of blood.

Blood tests are valuable diagnostic tools healthcare professionals use to gather important information about your health. They offer insight into your well-being, from organ function to nutrient deficiencies.

But why are blood tests so crucial? What do they really tell us about our health, and how can this information influence our longevity? Let's look at important insights that can answer these questions.

Understanding blood tests and longevity

Some important blood tests for assessing overall health and longevity include:

  • Lipid panel
  • Fasting blood glucose
  • Complete blood count
  • Inflammatory markers like C-reactive protein
  • Vitamin D and B12 levels
  • Hormones like thyroid-stimulating hormone (TSH)

Regular monitoring of markers like these can help you establish a baseline and identify trends over time to determine what lifestyle factors are working for you.

However, while blood tests offer valuable insights, they are just one part of a comprehensive health assessment, and other factors like genetics and lifestyle also play significant roles in predicting longevity.

Key insights that individuals can gain from blood tests include:

1. Metabolic status

Metabolism shows how the body consumes and uses energy for biological processes. Examples of biomarkers that reflect these processes include:

  • Cholesterol
  • Glucose
  • HbA1c
  • Insulin

Monitoring metabolism is crucial due to its association with an elevated risk of various chronic diseases such as diabetes and heart disease, which significantly affect overall longevity.

2. White and red blood cell health

Complete blood count (CBC) provides essential health insights, including red and white blood cell counts, hemoglobin levels, and platelet counts, helping diagnose anemia, infection, and blood disorders.

Red blood cells play a role in endurance capacity and ability to sustain muscular activities while white blood cells are associated with immune system function and overall wellness.

3. Disease detection and life expectancy

Are blood tests accurate for identifying disease and predicting longevity? Although blood tests can't definitively predict your lifespan, they do contain significant indicators that can offer insights into your overall health. If you optimize these markers, you can improve your healthspan, the number of years spent in generally good health without chronic disease.

What are some examples of biomarkers? Common ones include: 

  • Vitamin D supports bone and muscle health while playing a role in immune system regulation and protecting against certain diseases.
  • LDL cholesterol: High LDL can raise the risk of heart disease, a major contributor to mortality.
  • Inflammatory markers, like elevated C-reactive protein (CRP) levels, can indicate inflammation linked to chronic diseases like arthritis and heart disease.

Note: No single blood test can determine life expectancy accurately. Life expectancy is influenced by numerous factors like genetics, lifestyle, and overall health.

4. Endurance and recovery

Specialized blood tests for athletes can help fine-tune physical performance and monitor their health. These tests may include markers like:

  • Creatine kinase and myoglobin to assess muscle health
  • Ferritin for iron levels
  • Cortisol to gauge stress
  • Vitamin D and B levels to guide dietary adjustments

Additionally, comprehensive panels can evaluate vitamins, hormones, and inflammatory markers. These tests provide valuable insights for personalized nutrition and training adjustments, helping athletes perform at their best while safeguarding their well-being.

5. Testosterone levels

Testosterone blood tests can be relevant in various situations, such as:

  • Assessing hormonal imbalances
  • Monitoring athletes for performance-enhancing drug use
  • Diagnosing conditions like polycystic ovary syndrome (PCOS)
  • Evaluating fertility issues

It's crucial to consult a healthcare professional for proper evaluation and interpretation of testosterone levels in females, as they play a vital role in overall health and well-being.

Does menstruation affect blood test results?

Yes. Iron levels may drop temporarily during menstruation, affecting tests like CBC and iron panels. Hormonal fluctuations can also influence cholesterol and glucose levels.

To ensure accurate results, it's advisable to schedule non-urgent blood tests a few days after your period ends. Always inform your healthcare provider about your menstrual cycle when interpreting test results for a more accurate assessment.

6. Biological age

Blood tests to determine biological age involve analyzing biomarkers associated with aging and disease. While some biological age scores rely on genetics, using blood biomarkers allows you to track how beneficial health changes work to reduce your biological age.

With InsideTracker's biological age calculation InnerAge 2.0, you can quantify how certain biomarkers impact your body’s internal age and get recommendations to improve them.

» Unlock the benefits of blood testing to estimate biological age

Longevity and insight: A blood test away

Blood tests and monitoring can offer a wealth of insight into your overall well-being and reveal trends in your health. 

InsideTracker works to help you take control of your health by providing biomarker analyses, a customized Action Plan, science-backed recommendations, and customer-exclusive healthspan resources. Taking your health into your own hands is easier than ever.

InsideTracker doesn't diagnose medical conditions. For any health concerns, visit a qualified healthcare professional.