Author
Erica Finnan, MSN, APRN-C
Board-Certified Nurse Practitioner, Trained in Functional/Integrative Medicine and Bioidentical Hormone Balancing
Founder, ClearSignal Health
Erica Finnan, MSN, APRN-C, is a board-certified nurse practitioner with advanced training in functional and integrative medicine and bioidentical hormone balancing. She is the founder of ClearSignal Health and the clinician who personally reviews every ClearSignal lab report.
Her clinical work centers on the space most of medicine skips: the years between "nothing is wrong yet" and a diagnosis. Over years of practice she saw the same pattern again and again — patients told their labs were normal while their energy, sleep, weight, mood, and cognition told a very different story. Standard reference ranges are built from a broad population, many of whom are not metabolically healthy. Normal is not the same as optimal.
ClearSignal exists to close that gap. It pairs in-depth biomarker testing with a personal specialist review and a written wellness plan that translates the numbers into plain language and concrete next steps.
Areas of focus
- Thyroid function beyond TSH — Free T3, Free T4, Reverse T3, and antibodies
- Female hormone health across perimenopause and menopause
- Male hormone health, including testosterone, SHBG, and estradiol balance
- Metabolic health and early insulin resistance
- Cardiovascular risk markers such as ApoB and lipoprotein(a)
- Inflammation, nutrient status, and healthy aging
Approach to interpreting laboratory data
Interpretation matters more than the number. A biomarker only becomes useful in the context of your symptoms, your history, and the other markers around it.
Optimal ranges, not just laboratory ranges. A result inside the reference range can still be far from where most people feel and function well.
Patterns over single values. Insulin, thyroid, sex hormones, and inflammation move together — reading them in isolation is how early dysfunction gets missed.
Education first. You should leave with an understanding of your own physiology, not a PDF you cannot read.
Recent guides by Erica
Article
Preventative Blood Tests by Decade
What is worth measuring at 30 is not what is worth measuring at 60. A decade-by-decade view of preventative blood testing.
Article
Functional Medicine Blood Tests
Functional testing is not a different laboratory. It is a wider panel and a different interpretive standard — optimal ranges, pattern reading, and root-cause questions.
Article
Thyroid Tests Beyond TSH
TSH is one signal from the pituitary. A complete thyroid assessment measures the hormones themselves, how well they convert, and whether your immune system is involved.
Article
Perimenopause Blood Tests
Perimenopause can begin a decade before your final period, and hormone levels swing rather than simply fall. Testing well means testing the right markers at the right time.
Article
Normal Labs But You Don't Feel Well
Normal is a statistical statement about a population, not a clinical statement about you. Here is what a reference range actually represents — and what to do next.
Article
Blood Tests That Matter for Longevity
Longevity medicine tracks a small set of markers that predict decades of trajectory rather than confirming today's diagnosis. Here is what those markers are and why.