Endurance + Nutrition Check

The primary male sex hormone, also important in women at lower levels. Testosterone regulates muscle mass, bone density, fat distribution, libido, and mood. Levels decline naturally with age in both sexes.

The unbound, biologically active fraction of testosterone (typically 1–3% of total). Free testosterone is the form that can enter cells and exert effects. More clinically relevant than total testosterone for assessing hormonal status.

Protein binding testosterone and oestradiol; changes affect hormone availability.

The most potent and prevalent form of estrogen. In women, estradiol regulates the menstrual cycle, fertility, and bone density. In men, it's produced from testosterone and plays roles in bone health and libido. Levels vary significantly with age and menstrual cycle.

Stimulates egg maturation; high levels indicate poor ovarian reserves.

Works with FSH to regulate reproductive function. In women, an LH surge triggers ovulation. In men, LH stimulates testosterone production. Abnormal levels can indicate pituitary or gonadal disorders.

A hormone essential for menstrual cycle regulation and pregnancy maintenance. Progesterone rises after ovulation, preparing the uterus for implantation. Low levels can cause irregular periods and difficulty maintaining pregnancy.

A hormone primarily known for stimulating breast milk production. Elevated prolactin in non-pregnant individuals can indicate pituitary tumors, medication side effects, or hypothyroidism. High levels can suppress reproductive hormones.

A hormone produced mainly by the liver in response to growth hormone. IGF-1 mediates many of growth hormone's effects on tissue growth and repair. It's more stable than GH, making it a better marker for growth hormone status.

The primary stress hormone, produced by the adrenal glands. Cortisol regulates metabolism, immune response, blood pressure, and the sleep-wake cycle. Chronically elevated cortisol from stress contributes to weight gain, immune suppression, and metabolic dysfunction.

The sulfated, stable form of DHEA with a long half-life, making it the preferred test for adrenal androgen production. DHEA-S is the most abundant circulating steroid hormone and a key longevity biomarker.

The primary screening test for thyroid function. TSH is produced by the pituitary gland to regulate thyroid hormone production. High TSH indicates an underactive thyroid (hypothyroidism), while low TSH suggests an overactive thyroid (hyperthyroidism).

The unbound, active form of the main thyroid hormone T4. Free T4 directly reflects thyroid gland output and is used alongside TSH to diagnose and monitor thyroid disorders.

The active form of thyroid hormone responsible for regulating metabolism, energy, and body temperature. Free T3 is converted from T4 in tissues and is three to four times more potent than T4.

Measures the number of red blood cells in your blood. Red blood cells carry oxygen from your lungs to every cell in your body. Abnormal levels can indicate anemia, dehydration, or bone marrow disorders.

The iron-rich protein in red blood cells responsible for carrying oxygen throughout your body and returning carbon dioxide to the lungs. Low haemoglobin is the primary marker for anemia and can cause fatigue, weakness, and shortness of breath.

The percentage of your blood volume occupied by red blood cells. It reflects the balance between red blood cell production and loss, helping diagnose anemia, dehydration, and polycythemia.

The average size of your red blood cells. Small cells (microcytic) suggest iron deficiency, while large cells (macrocytic) may indicate vitamin B12 or folate deficiency. Normal-sized cells with low count suggest chronic disease.

The average amount of hemoglobin in each red blood cell. Low MCH indicates that red blood cells carry less oxygen than normal, commonly seen in iron-deficiency anemia.

The average concentration of hemoglobin within each red blood cell. It helps differentiate types of anemia — low MCHC points to iron deficiency, while high MCHC can indicate spherocytosis.

Measures the variation in size among your red blood cells. A high RDW means your red blood cells vary significantly in size, which can help distinguish between different types of anemia.

Measures the total number of white blood cells, your body's primary defense against infection. Elevated levels may indicate infection, inflammation, or immune disorders, while low levels can signal bone marrow problems or autoimmune conditions.

The percentage of white blood cells that are eosinophils. Elevated eosinophil percentages are commonly associated with allergic reactions and parasitic infections.

The percentage of white blood cells that are monocytes. Monocytes are part of the innate immune system and develop into macrophages and dendritic cells in tissues.

The percentage of white blood cells that are lymphocytes, key players in adaptive immunity including antibody production and cell-mediated immune responses.

The percentage of white blood cells that are neutrophils. Neutrophils are the most common WBC type and respond primarily to bacterial infections.

The percentage of white blood cells that are basophils. Basophils play a role in allergic reactions by releasing histamine and other inflammatory mediators.

Measures the number of platelets, small cell fragments essential for blood clotting. Low platelets increase bleeding risk, while high platelets may increase clot risk. Important for monitoring clotting disorders and medication effects.

If you have diabetes your body doesn't process glucose effectively.

A hormone produced by the pancreas that helps to control blood glucose levels and plays a role in controlling the levels of carbohydrates and fats stored in the body.

Calculation assessing insulin resistance; higher scores indicate increased risk of type 2 diabetes and cardiovascular disease.

Reflects your average blood sugar over the past 2–3 months by measuring the percentage of hemoglobin with attached glucose. HbA1c is the gold standard for diagnosing and monitoring diabetes, unaffected by daily fluctuations.

The best indicator of overall vitamin D status. Vitamin D is essential for calcium absorption, bone health, immune function, and mood regulation. Deficiency is extremely common, especially in northern latitudes, and linked to increased disease risk.

The most abundant mineral in the body, essential for bone health, muscle contraction, nerve function, and blood clotting. Blood calcium is tightly regulated by parathyroid hormone and vitamin D. Abnormal levels can indicate parathyroid disorders.

Calcium adjusted for albumin levels to provide a more accurate measure of physiologically active calcium. Important because total calcium can appear falsely low when albumin is low, even if actual calcium is normal.

If too much urate is produced or not enough is excreted, it can accumulate and lead to gout – an inflammation that occurs in joints.

A mineral essential for bone formation, energy metabolism (ATP), and acid-base balance. Phosphate levels are inversely related to calcium and regulated by parathyroid hormone and vitamin D.

Involved in over 300 enzymatic reactions including energy production, muscle function, and nerve signaling. Magnesium deficiency is common and associated with muscle cramps, anxiety, insomnia, and increased cardiovascular risk.

The combined measure of all cholesterol in your blood, including HDL, LDL, and VLDL. While useful as an overview, the breakdown between HDL and LDL is more clinically meaningful for assessing cardiovascular risk.

Often called 'bad' cholesterol, LDL deposits cholesterol in artery walls, contributing to plaque buildup and atherosclerosis. LDL is the primary target for cardiovascular risk reduction through diet, exercise, and medication.

Often called 'good' cholesterol, HDL carries cholesterol away from arteries back to the liver for removal. Higher HDL levels are protective against heart disease. Exercise, healthy fats, and moderate alcohol intake can raise HDL.

The most common type of fat in the body, stored for energy. Elevated triglycerides — often from excess sugar, alcohol, or calories — increase cardiovascular risk and can cause pancreatitis at very high levels.

Non-HDL cholesterol is the total cholesterol minus HDL cholesterol, representing all "bad" cholesterols. High levels can increase the risk of heart disease.

Bilirubin is a substance produced during the normal breakdown of red blood cells. High levels can lead to jaundice and indicate liver or bile duct problems.

An enzyme found in the liver, bones, kidneys, and digestive system. Elevated ALP can indicate bile duct obstruction, liver disease, or bone disorders. It's normally higher in children and during pregnancy due to bone growth.

Enzyme from liver and heart; high levels indicate liver damage.

A liver enzyme that helps convert proteins into energy. ALT is found primarily in the liver, making it a highly specific marker for liver damage. Elevated levels may indicate hepatitis, fatty liver disease, or medication-related liver injury.

A liver enzyme sensitive to alcohol use and bile duct problems. GGT is often the first liver enzyme to rise when bile ducts are blocked. Combined with ALP, it helps determine whether elevated ALP is from liver or bone.

The most abundant protein in blood, produced by the liver. Albumin maintains blood volume and pressure, and transports hormones, vitamins, and drugs. Low levels indicate liver disease, kidney disease, malnutrition, or chronic inflammation.

Measures the combined amount of albumin and globulin proteins in your blood. These proteins are essential for fighting infections, blood clotting, and transporting substances throughout the body.

A group of proteins in blood including antibodies (immunoglobulins), transport proteins, and enzymes. Elevated globulin can indicate chronic infection, inflammation, or blood cancers. Calculated by subtracting albumin from total protein.

The primary electrolyte regulating fluid balance and blood pressure. Sodium is essential for nerve impulses and muscle contractions. Abnormal levels can cause confusion, seizures, and cardiac arrhythmias.

A critical electrolyte for heart rhythm, muscle contractions, and nerve function. Both high and low potassium can cause dangerous cardiac arrhythmias. Levels are influenced by kidney function, medications, and diet.

An electrolyte that works with sodium to maintain fluid balance, blood pressure, and acid-base balance. Chloride abnormalities often accompany sodium abnormalities and can indicate dehydration, kidney disease, or metabolic disorders.

A key component of the body's acid-base buffering system. Bicarbonate levels reflect the balance between acids and bases in the blood. Abnormal values help diagnose metabolic acidosis or alkalosis.

A waste product from protein breakdown, processed by the liver and excreted by the kidneys. Elevated urea levels can indicate kidney dysfunction, dehydration, high-protein diet, or gastrointestinal bleeding.

A waste product from normal muscle metabolism, filtered by the kidneys. Blood creatinine levels reflect kidney filtration capacity. Elevated levels may indicate impaired kidney function, dehydration, or excessive muscle breakdown.

An estimated measure of how well your kidneys filter waste from the blood. It's calculated from creatinine levels, age, sex, and race. eGFR is the primary marker used to stage chronic kidney disease.

An enzyme produced by the pancreas to digest fats. Lipase is more specific to the pancreas than amylase, making it the preferred test for pancreatitis. It remains elevated longer than amylase after pancreatic inflammation.

An enzyme that breaks down starch into sugars, produced primarily by the pancreas and salivary glands. Elevated amylase is a key marker for acute pancreatitis and can also indicate salivary gland disorders.

An amino acid produced during protein metabolism. Elevated homocysteine is an independent risk factor for cardiovascular disease, stroke, and cognitive decline. Levels are lowered by adequate B12, folate, and B6 intake.

An enzyme found primarily in muscle tissue (skeletal and cardiac). Elevated CK indicates muscle damage from exercise, injury, or disease. Very high levels can indicate rhabdomyolysis, a potentially dangerous breakdown of muscle tissue.

A highly sensitive test for low-grade chronic inflammation linked to cardiovascular disease risk. Lower hs-CRP values are associated with better cardiovascular outcomes.

An enzyme found in nearly all body tissues. Elevated LDH is a general marker of tissue damage and can indicate liver disease, heart attack, anemia, muscle injury, or certain cancers.

The primary iron storage protein. Ferritin reflects total body iron stores and is the first marker to drop in iron deficiency. However, ferritin also rises with inflammation, infection, and liver disease, which can mask true iron deficiency.

A trace mineral crucial for thyroid hormone metabolism, antioxidant defense (via selenoproteins), and immune function. Selenium deficiency can impair thyroid function and increase susceptibility to viral infections.

A trace mineral essential for iron metabolism, connective tissue formation, and antioxidant defense. The copper/zinc ratio is an emerging marker of inflammation and oxidative stress. Both deficiency and excess can cause problems.

An essential trace mineral involved in immune function, wound healing, DNA synthesis, and testosterone production. Zinc deficiency impairs immune response, delays wound healing, and can cause hair loss and taste changes.

A commonly cited range for the copper to zinc ratio is 0.7 and 1.0. Studies have noted that ratios above 1.0 may be associated with higher levels of inflammation and oxidative stress.

Active vitamin B12 is the biologically active form of vitamin B12 that is essential for many physiological processes in the body, including the production of red blood cells, DNA synthesis, and nerve function.

Essential for DNA synthesis, cell division, and red blood cell formation. Folate deficiency causes megaloblastic anemia and, during pregnancy, increases the risk of neural tube defects. Works closely with vitamin B12.

Essential for energy metabolism and nervous system function. Thiamine deficiency can cause beriberi (nerve damage) and Wernicke-Korsakoff syndrome. Common in chronic alcohol use and malabsorption conditions.

Involved in over 100 enzyme reactions, primarily in protein metabolism, neurotransmitter synthesis, and immune function. Deficiency can cause anemia, dermatitis, and neurological symptoms. Excess supplementation can cause nerve damage.

A powerful water-soluble antioxidant essential for collagen synthesis, immune function, and iron absorption. Vitamin C deficiency causes scurvy. It also supports wound healing and protects against oxidative stress.

A fat-soluble vitamin essential for vision, immune function, skin health, and cell growth. Both deficiency and excess can cause health problems. Levels are tightly regulated by the liver.

A fat-soluble antioxidant that protects cell membranes from oxidative damage. Vitamin E works synergistically with vitamin C and selenium. Deficiency is rare but can cause nerve and muscle damage.

The most abundant type of white blood cell, forming the first line of defense against bacterial and fungal infections. Elevated neutrophils typically indicate active infection or inflammation.

Measures the number of lymphocytes, including B cells and T cells that drive adaptive immunity. Elevated levels may indicate viral infections, while low levels can signal immune deficiency or HIV.

Measures monocytes, the largest white blood cells. They mature into macrophages in tissues, where they engulf pathogens and dead cells. Elevated monocytes can indicate chronic infection or inflammatory conditions.

Measures eosinophils, white blood cells involved in fighting parasitic infections and mediating allergic responses. Elevated levels are associated with allergies, asthma, parasitic infections, and certain autoimmune conditions.

The rarest type of white blood cell, involved in allergic reactions and inflammatory responses. Basophils release histamine and heparin, contributing to immediate hypersensitivity reactions.

A mineral essential for oxygen transport (in hemoglobin), energy production, and immune function. Serum iron measures the amount circulating in blood, but ferritin and TIBC provide a more complete picture of iron status.

The percentage of transferrin (iron-transporting protein) that is carrying iron. Calculated from serum iron and TIBC. Low saturation indicates iron deficiency; high saturation may indicate hemochromatosis (iron overload).