Quick answer: Functional lab testing can add detail beyond a standard checkup, looking at metabolism, hormones, gut health, nutrient status, inflammation and cardiometabolic risk. It is optional and most useful in complex cases. In my practice, functional labs are available only to patients working 1-on-1 with me, and results are always interpreted in the context of your history and goals.
Key takeaways
Functional labs can add detail on metabolism, hormones, gut health, nutrients and inflammation beyond a standard checkup.
Testing is optional and tends to be most useful in complex or long-standing cases.
Results are only meaningful when read alongside your history and goals, which is why they are interpreted one-on-one.
What functional testing can add
Standard blood work screens for disease. Functional testing can sometimes show earlier patterns, such as nutrient gaps, blood sugar strain or inflammation, that help personalize a plan. It does not replace standard medical care.
Commonly used tests
- Organic acids test: markers of energy production, nutrient status and gut metabolism
- Hormone panels: thyroid, sex hormones and cortisol patterns (see cortisol patterns)
- Gut and digestive testing: microbiome balance, digestion and inflammation (see microbiome diversity)
- Inflammation and oxidative stress markers: such as hs-CRP
- Nutrient and toxic element testing: vitamins, minerals and heavy metals
- Advanced cardiometabolic panels: ApoB, Lp(a), fasting insulin and more (see understanding your lipids)
Turning data into action
Results show patterns that guide nutrition, lifestyle and supplement choices. Retesting at intervals can show whether the plan is working.
Who may benefit
This testing may benefit people with complex or long-standing symptoms, and people whose standard labs are normal but who still feel unwell. It can also help people who want to track healthy-aging markers over time.
Functional labs are optional. They can be helpful in more complex cases, and in my practice they are available only to patients working 1-on-1 with me.
Testing and healthy aging
Biomarkers can reflect several processes of aging, such as chronic inflammation, mitochondrial function, nutrient sensing and oxidative stress. Tracking them helps personalize a longevity plan.
When to see a naturopathic doctor
It may be time to see a naturopathic doctor if you have complex symptoms without clear answers, or if you want to know whether functional testing is worthwhile for you. The same is true if you want to track healthy-aging markers, or if you want a 1-on-1 personalized plan.
Wondering whether testing would help you?
A free 15-minute consultation with Dr. Kneessi. No cost, no obligation. In-office in Odenton, MD or by telehealth.
Questions to bring to your clinician
These questions can help you get the most out of your next visit.
Which functional tests, if any, would add something useful beyond my standard bloodwork?
How should I read functional lab testing alongside the rest of my labs and my symptoms?
How often would it make sense to recheck functional lab testing in my situation?
Which daily habits or medications could be influencing functional lab testing before we retest?
Frequently asked questions
Are functional labs required to work with you?
No. They are optional and most useful in complex cases.
Does insurance cover functional labs?
Coverage varies. Many functional tests are self-pay.
What is an organic acids test?
A urine test that looks at metabolic byproducts related to energy, nutrients and gut bacteria.
Can I order functional labs without a visit?
In my practice, functional labs are available only to patients working 1-on-1 with me.
Sources
- Ridker PM, et al. Comparison of C-reactive protein and low-density lipoprotein cholesterol levels in the prediction of first cardiovascular events. N Engl J Med 2002. PMID: 12432042. https://pubmed.ncbi.nlm.nih.gov/12432042/
- Sniderman AD, et al. Apolipoprotein B Particles and Cardiovascular Disease: A Narrative Review. JAMA Cardiol 2019. PMID: 31642874. https://pmc.ncbi.nlm.nih.gov/articles/PMC7369156/
- Kronenberg F, et al. Lipoprotein(a) in atherosclerotic cardiovascular disease and aortic stenosis: a European Atherosclerosis Society consensus statement. Eur Heart J 2022. PMID: 36036785. https://pmc.ncbi.nlm.nih.gov/articles/PMC9639807/
- Justice JN, et al. A framework for selection of blood-based biomarkers for geroscience-guided clinical trials: report from the TAME Biomarkers Workgroup. Geroscience 2018. PMID: 30151729. https://pmc.ncbi.nlm.nih.gov/articles/PMC6294728/
- MedlinePlus: Lab Tests
- MedlinePlus: C-Reactive Protein (CRP) Test
This article is for educational purposes only and is not medical advice. It does not replace an individual evaluation. Talk with your healthcare provider before starting supplements or changing medications, especially if you are pregnant, nursing, or managing a health condition.
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