Hormones
FSH (Follicle Stimulating Hormone)
Unit: mIU/mLID: H010
What This Test Measures
Pituitary hormone; stimulates sperm/egg production
Conventional vs. Functional Optimal Range
Conventional "Normal"
1.5-12.4 (men), varies by cycle (women) mIU/mLYour doctor says you're "fine" anywhere in this range
Functional Optimal
3-8 (men), low follicular (women) mIU/mLThis is where you actually feel great
The gap between these ranges is why you feel terrible with "normal" labs. Conventional medicine waits for disease. Functional medicine optimizes for health.
Gabriel's Take
FSH stimulates sperm (men) and egg development (women). High FSH in women >40 = approaching menopause. High FSH + low T in men = testicular failure (primary hypogonadism). FSH:LH ratio helps diagnose reproductive issues.
When This Test Is High
Menopause (high in women), primary hypogonadism (high with low T)
When This Test Is Low
Low pituitary function, hypothalamic suppression
Related Conditions
Infertility, menopause, hypogonadism
Recommended Follow-Up
Check LH, testosterone, estradiol; assess reproductive function