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Glossary

Plain-language explanations of the tests, measures, therapies, and concepts used in longevity medicine.

A

Andropause

Andropause is an informal term for age-associated hormonal and symptomatic changes in some men, often discussed in relation to testosterone.

B

C

Cortisol

Cortisol is a steroid hormone produced by the adrenal cortex that participates in metabolism, immune signalling, blood-pressure regulation, and the stress response.

D

DHEA

DHEA, or dehydroepiandrosterone, is a steroid hormone made mainly by the adrenal glands and used as a precursor for other hormones.

E

Estradiol

Estradiol is a steroid hormone and the predominant form of estrogen during much of the reproductive years.

F

Free Testosterone

Free testosterone is the small fraction of circulating testosterone that is not bound to sex hormone binding globulin or albumin.

M

Menopause

Menopause is the life stage marked by the permanent end of menstrual periods because ovarian follicular activity has ceased.

P

Perimenopause

Perimenopause is the transition leading up to menopause, during which menstrual patterns and ovarian hormone production can become more variable.

Progesterone

Progesterone is a steroid hormone involved in the menstrual cycle, pregnancy, and signalling in several body tissues.

S

Sex Hormone Binding Globulin

Sex hormone binding globulin is a liver-produced protein that carries testosterone and estradiol in the bloodstream.

T

Testosterone

Testosterone is a steroid hormone involved in reproductive function, sexual development, bone, muscle, blood-cell production, and other body processes.