Longevity

Gamma GT Blood Test: Normal Ranges, Causes & Wh...

What Is Gamma GT? Gamma-glutamyl transferase (GGT), also called gamma GT, is an enzyme found on the surface of cells throughout the body, with the highest concentrations in the liver,...

G6PD Blood Test: Normal Ranges, Causes & What Y...

What Is G6PD? Glucose-6-phosphate dehydrogenase (G6PD) is an enzyme found in all cells, but it is particularly important in red blood cells. It catalyses the first step of the pentose...

Free Androgen Index (FAI) Blood Test: Normal Ra...

What Is the Free Androgen Index? The free androgen index (FAI) is a calculated ratio that estimates the amount of biologically active (free) testosterone circulating in your blood. It is...

Follicle Stimulating Hormone (FSH) Blood Test: ...

What Is Follicle Stimulating Hormone? Follicle stimulating hormone (FSH) is a gonadotropin produced by the anterior pituitary gland in the brain. In women, FSH stimulates the growth and maturation of...

Folate (Serum) Blood Test: Normal Ranges, Cause...

What Is Folate? Folate (vitamin B9) is a water-soluble B vitamin essential for DNA synthesis, cell division, and amino acid metabolism. The term 'folate' refers to the naturally occurring forms...

Ferritin Blood Test: Normal Ranges, Causes & Wh...

What Is Ferritin? Ferritin is the body's primary iron storage protein. Each ferritin molecule can hold up to 4,500 iron atoms in its hollow spherical shell, safely sequestering iron that...