Reading Your Blood Work: A Plain-English Guide

## Why Your Blood Work Matters Blood work is one of the most powerful tools in medicine. A single blood draw can reveal how well your organs are functioning, whether your hormones are balanced, how your body is managing blood sugar and cholesterol, and whether inflammation or nutrient deficiencies are present. For members on treatment through Clyne, regular lab work is how your physician monitors your response and ensures your safety. But lab results can be intimidating. Pages of numbers, abbreviations, and reference ranges make it hard to know what actually matters. This guide walks through the most commonly ordered biomarkers in plain English. ## How to Read a Lab Report Every lab result has three key components: the biomarker name (what was measured), your result (the number), and the reference range (the "normal" range for the general population). If your result falls within the reference range, it is flagged as normal. If it falls outside, it is flagged as high (H) or low (L). Important context: reference ranges represent where the majority of healthy people fall. Being slightly outside the range is not always cause for concern, and being inside the range does not always mean everything is optimal. Your physician interprets your results in the context of your symptoms, medical history, and treatment goals. ## Complete Blood Count (CBC) The CBC is one of the most commonly ordered tests. It provides a snapshot of your blood cells. **White blood cells (WBC)** are your immune system's front line. Elevated WBC can indicate infection, inflammation, or stress. Low WBC can indicate immune suppression or certain medications. **Red blood cells (RBC) and hemoglobin** carry oxygen throughout your body. Low levels indicate anemia, which causes fatigue and shortness of breath. High levels can occur with dehydration or, notably, with testosterone replacement therapy, which stimulates red blood cell production. This is one reason TRT requires regular monitoring. **Hematocrit** is the percentage of your blood volume composed of red blood cells. Elevated hematocrit (above 54 percent) increases blood viscosity and can raise the risk of blood clots. Members on TRT are monitored for hematocrit elevation, and dose adjustments or blood donations may be recommended if levels climb too high. **Platelets** are involved in blood clotting. Low platelets can cause easy bruising or bleeding. High platelets can increase clotting risk. ## Comprehensive Metabolic Panel (CMP) The CMP assesses organ function and metabolic balance. **Glucose** measures blood sugar at the time of the draw. Fasting glucose above 100 mg/dL suggests prediabetes. Above 126 mg/dL on two separate occasions indicates diabetes. Blood sugar regulation is particularly relevant for members on GLP-1 medications, which improve glucose metabolism. **Hemoglobin A1c (HbA1c)** reflects your average blood sugar over the past two to three months. It is a more stable indicator of glucose control than a single fasting glucose. Below 5.7 percent is normal, 5.7 to 6.4 percent indicates prediabetes, and 6.5 percent or above indicates diabetes. **Kidney function markers** (BUN, creatinine, eGFR) assess how well your kidneys are filtering waste. Elevated creatinine or decreased eGFR can indicate impaired kidney function. These are monitored routinely during most treatments. **Liver function markers** (ALT, AST, alkaline phosphatase) assess liver health. Mild elevations can occur with certain medications, alcohol use, fatty liver disease, or intense exercise. Persistently elevated liver enzymes require investigation. **Electrolytes** (sodium, potassium, chloride, calcium) are essential for nerve function, muscle contraction, and hydration balance. Significant abnormalities can cause muscle cramps, heart rhythm irregularities, or fatigue. ## Lipid Panel The lipid panel measures fats in your blood and assesses cardiovascular risk. **Total cholesterol** is the sum of all cholesterol types. While a useful overview, the individual components (LDL, HDL, triglycerides) are more informative for risk assessment. **LDL ("bad" cholesterol)** deposits cholesterol in arterial walls, contributing to plaque formation and cardiovascular disease. Lower is generally better, with targets depending on your overall cardiovascular risk profile. **HDL ("good" cholesterol)** removes cholesterol from arteries and transports it to the liver for elimination. Higher is better. Regular exercise, healthy fats, and moderate alcohol consumption can increase HDL. **Triglycerides** are a type of fat stored in your blood. Elevated triglycerides (above 150 mg/dL) increase cardiovascular risk and are associated with insulin resistance, high-sugar diets, and excessive alcohol intake. GLP-1 medications often improve triglyceride levels as a secondary benefit. ## Hormone Panel For members being evaluated for or treated with hormone therapy, a comprehensive hormone panel is essential. **Total testosterone** is the overall amount of testosterone in your blood. Normal range is broadly defined as 264 to 916 ng/dL, though symptom thresholds vary by individual. **Free testosterone** is the biologically active fraction not bound to proteins. It is often the more clinically relevant number because it represents the testosterone actually available to your tissues. **Estradiol (E2)** is a form of estrogen. Men produce estrogen through aromatization of testosterone. Monitoring estradiol during TRT is important because elevated levels can cause water retention, mood changes, and gynecomastia. **Thyroid hormones (TSH, Free T4, Free T3)** regulate metabolism, energy, and mood. Abnormal thyroid function can mimic symptoms of low testosterone (fatigue, weight gain, brain fog, depression) and should be screened for during a hormonal evaluation. ## Making Sense of Your Results Numbers on a page only become meaningful in context. A single elevated or low value is not necessarily alarming. Trends over time are more important than individual snapshots. Your physician considers the full picture: your symptoms, your medication history, your lifestyle, and how your results compare to previous draws. Your Clyne dashboard displays your lab results alongside your treatment timeline, making it easy to see how your biomarkers change in response to treatment. If you have questions about any result, your care team is available to explain what it means and whether any action is needed.