Longevity

eGFR Blood Test: Normal Ranges, Causes & What Y...

What Is eGFR? The estimated glomerular filtration rate (eGFR) is a calculated measure of how efficiently your kidneys filter waste from the blood. It is derived from your serum creatinine...

ESR Blood Test: Normal Ranges, Causes & What Yo...

What Is ESR? The erythrocyte sedimentation rate (ESR) measures how quickly red blood cells settle to the bottom of a test tube over one hour. It is one of the...

Dihydrotestosterone (DHT) Blood Test: Normal Ra...

What Is Dihydrotestosterone? Dihydrotestosterone (DHT) is a potent androgen hormone derived from testosterone through the action of the enzyme 5-alpha reductase. Although DHT circulates at much lower concentrations than testosterone,...

DHEA Sulphate Blood Test: Normal Ranges, Causes...

What Is DHEA Sulphate? Dehydroepiandrosterone sulphate (DHEA-S) is the most abundant steroid hormone in the human body. Produced primarily by the adrenal glands, it serves as a precursor to both...

Creatinine Blood Test: Normal Ranges, Causes & ...

What Is Creatinine? Creatinine is a waste product generated by the normal breakdown of creatine phosphate in skeletal muscle. It is produced at a fairly constant rate, filtered out of...

Creatine Kinase Blood Test: Normal Ranges, Caus...

What Is Creatine Kinase? Creatine kinase (CK), also known as creatine phosphokinase (CPK), is an enzyme found predominantly in skeletal muscle, the heart, and the brain. Its primary role is...