A Guide to Biomarkers for Adults
By Charles Kamen, MD, board-certified neurologist
Biomarkers are measurable biological signals — blood, hormone, and metabolic markers — that reveal how fast you are aging on the inside and where disease risk is building, often years before symptoms appear. In longevity medicine, specific biomarkers correlate with biological aging rate, metabolic health, and how well an intervention is working, which makes them the foundation of any evidence-based plan. [1]
Dr. Charles Kamen, MD, a board-certified neurologist at LiveNow Longevity in Las Vegas, uses comprehensive biomarker panels to catch modifiable risk early and personalize each protocol. Individual results vary with any health optimization approach.
What Are Biomarkers in Longevity Medicine?
Biomarkers are objective, measurable indicators — blood glucose, cholesterol, inflammatory proteins, hormones, and more — that reflect your current health, the pace of biological aging, and future disease risk. In longevity medicine, they let Dr. Kamen see dysfunction while it is still modifiable, turning vague symptoms into data that guides targeted, personalized treatment. [1]
A single value rarely tells the whole story, so Dr. Kamen reads patterns across metabolic, inflammatory, hormonal, and nutritional markers together to find the risk factors that matter most.
Which Biomarkers Belong in a Comprehensive Longevity Panel?
A comprehensive longevity panel spans six categories — metabolic, inflammatory, hormonal, nutritional, oxidative-stress, and organ-function markers — so no major system is missed. Together they build a full picture of metabolic health, cardiovascular risk, hormone balance, and cellular resilience, rather than the narrow snapshot a standard checkup provides.
- Metabolic markers: Fasting glucose, HbA1c, insulin, lipid panel
- Inflammatory markers: hs-CRP, homocysteine, ferritin
- Hormonal markers: Testosterone, estrogen, DHEA-S, cortisol
- Nutritional markers: Vitamin D, B12, folate, zinc, magnesium
- Oxidative stress markers: Glutathione, oxidized LDL
- Organ function markers: CMP, creatinine, liver enzymes
Which Biomarkers Reveal Biological Aging?
Several everyday labs double as biological-aging markers: hemoglobin A1c, hs-CRP, homocysteine, fasting insulin, and vitamin D. Each reflects a core aging process — blood-sugar control, chronic inflammation, cardiovascular and cognitive risk, insulin sensitivity, and immune resilience — and each is modifiable, which is why Dr. Kamen tracks them closely. [1]
Chronic low-grade inflammation, measured by hs-CRP, is increasingly recognized as a driver of aging itself — a process called inflammaging that links to cardiovascular disease and frailty. [3] Lowering it is one of the highest-value targets in a longevity plan.
- Hemoglobin A1c: Reflects average blood sugar over 90-120 days; elevated levels indicate metabolic dysfunction
- hs-CRP: High-sensitivity C-reactive protein measures systemic inflammation; elevated in chronic disease states
- Homocysteine: Amino acid elevated in B-vitamin deficiency and cardiovascular risk
- Insulin: Fasting insulin reflects insulin sensitivity and metabolic health
- Vitamin D: Deficiency associated with immune dysfunction, cardiovascular risk, and mortality
Why Interpretation Matters More Than the Number
A biomarker value alone is not actionable — context is everything. The same number can be reassuring in one patient and a red flag in another, so Dr. Kamen interprets each result against your history, symptoms, medications, and goals before building a targeted intervention plan. [2]
As a board-certified neurologist, he watches markers that touch the brain closely: elevated homocysteine and low B12, folate, or vitamin D can quietly undermine nerve function, memory, and daytime energy.
Can Biomarkers Catch Diabetes and High Cholesterol Early?
Yes — this is one of biomarker testing's greatest strengths. Fasting glucose, HbA1c, and fasting insulin can reveal insulin resistance years before blood sugar crosses into diabetes, while a full lipid panel exposes cholesterol problems that drive heart disease. Catching these early makes them far easier to correct through diet, exercise, and treatment.
Because fasting insulin often rises before glucose does, Dr. Kamen includes it rather than relying on glucose alone. Improving these markers is central to lower diabetes risk, healthier cholesterol, and a longer healthspan.
How Often Should You Retest Biomarkers?
Testing frequency depends on your results and treatment. Dr. Kamen starts with a full baseline panel, then rechecks actively treated markers every 3-6 months, monitors stable and optimal values annually, and tests more often when numbers are changing quickly or a concerning trend needs to be watched closely.
- Initial panel: full biomarker assessment establishes baseline
- 3-6 month recheck: for actively treated conditions or interventions
- Annual monitoring: for stable, optimal biomarkers
- Dynamic testing: more frequent for rapidly changing or concerning values
Key Takeaways
- Biomarkers are measurable indicators that correlate with biological aging rate, metabolic health, and disease risk, making them the foundation of longevity medicine.
- A comprehensive panel covers six categories: metabolic, inflammatory, hormonal, nutritional, oxidative-stress, and organ-function markers.
- Hemoglobin A1c reflects average blood sugar over the prior 90-120 days; elevated levels signal metabolic dysfunction.
- hs-CRP measures chronic low-grade inflammation (inflammaging), a driver of cardiovascular disease and frailty.
- Fasting glucose, HbA1c, and insulin can flag insulin resistance before diabetes, while a lipid panel exposes cholesterol risk early.
- Dr. Kamen rechecks actively treated markers every 3-6 months and stable, optimal values annually, personalizing each longevity protocol.
Common Questions
What biomarkers does Dr. Kamen test for longevity?
Dr. Kamen orders comprehensive panels covering metabolic markers such as glucose, HbA1c, insulin, and lipids, inflammatory markers like hs-CRP and homocysteine, hormones, and key nutrients including vitamin D and B12. Specific testing is individualized to your history, symptoms, and goals rather than a fixed one-size list.
Can biomarker testing catch diabetes or high cholesterol before symptoms?
Yes. Fasting glucose, HbA1c, and insulin can reveal insulin resistance years before blood sugar reaches the diabetic range, while a lipid panel flags cholesterol problems early. Catching these markers while they are still modifiable makes them far easier to correct with lifestyle changes and, when needed, treatment.
Do biomarkers actually predict longevity?
Certain biomarkers correlate with the rate of biological aging and disease risk, but no single value predicts lifespan on its own. They are most powerful as a panel, interpreted together in clinical context. Individual results vary based on genetics and lifestyle, which is why Dr. Kamen reads patterns, not isolated numbers.
What does an hs-CRP result tell me about my health?
hs-CRP measures low-grade chronic inflammation, sometimes called inflammaging because it accelerates aging and links to cardiovascular disease and frailty. An elevated level signals hidden inflammation worth addressing, while a low level is reassuring. It is one of the most modifiable and high-value markers in a longevity panel.
How often should I retest my biomarkers?
After an initial baseline panel, Dr. Kamen typically rechecks actively treated markers every 3-6 months, monitors stable and optimal values annually, and tests more frequently when results are changing quickly. The right cadence depends on your baseline, your treatment plan, and how your markers respond over time.
Can I improve my biomarkers without medication?
Often, yes. Many markers, including blood sugar, cholesterol, inflammation, and vitamin D, respond strongly to nutrition, exercise, sleep, and stress management. Dr. Kamen prioritizes these non-pharmaceutical approaches when appropriate and adds targeted supplementation or medication only when lifestyle changes are not enough to reach optimal ranges.
Comprehensive biomarker testing turns longevity from guesswork into a measurable, trackable plan — catching risk early and showing exactly what is working. Schedule a consultation with Dr. Kamen to establish your biomarker baseline and develop a personalized longevity protocol.
References
- Justice JN, et al. J Gerontol A Biol Sci Med Sci. 2024;79(3):glad245.
- Le Couteur DG, et al. Nat Med. 2023;29(7):1626-1638.
- Ferrucci L, Fabbri E. Nat Rev Cardiol. 2018;15(9):505-522. (Inflammaging: chronic inflammation in ageing, cardiovascular disease, and frailty).
Wondering what’s right for you?
Get a straight answer from board-certified neurologist Dr. Charles Kamen, MD. The evaluation is $88 and is applied toward your protocol if you continue care.