Andropause · Late-Onset Hypogonadism男性老化 · andropause 真相

Place · Level 3

30 后 T 缓慢降 1-2%/年 · 真低 T < 300 + 症状 · 测量陷阱 + SHBG · 生活方式优先 · TRT 适应症

Not female menopause analog

Stop 1/5

andropause ≠ 女性更年期翻版

'Andropause' / 'male menopause' is a popular phrase but a poor clinical term: male hormone changes are fundamentally different from female menopause.

Female menopause (Atlas `perimenopause`):

A cliff: estrogen drops 90%+ over a few yearsClear endpoint: 12 months with no periodUniversal: all women experience it
Male hormones (LOH, late-onset hypogonadism):

Slow linear decline: testosterone falls 1–2% per year after age 30No clear endpoint; most men still have measurable testosterone at 80Not universal; only ~2% of men meet the true clinical definition (EMAS, Wu 2010 NEJM)
EMAS true LOH definition (European Male Aging Study, n=3,369):

Total T < 11 nmol/L (~320 ng/dL) + free T < 220 pmol/LPlus 3 sexual symptoms: reduced libido + reduced morning erections + erectile dysfunctionBoth criteria met → true LOH in ~2.1% of men aged 40–79Single criterion is not enough: low T without symptoms doesn't count; symptoms without low T don't either
Why does this matter?

'T clinics' + anti-aging marketing in China + US massively expand the LOH conceptA 'man tired / low energy / can't lose weight' bucket — 90% has nothing to do with testosteroneEven with low T, lifestyle factors (obesity / sleep apnea / chronic opioids / depression) account for ~90% and are reversible
Normal testosterone range (healthy adult male):

Total testosterone: 264–916 ng/dL (slight lab variation)Free T: 9–30 ng/dL (Vermeulen calculation)Morning draw (7–10 am) is the daily peak — a single low reading doesn't countRepeat at least twice, 4–6 weeks apart, to rule out transient swings
'Is a slow T decline a disease?'

Not necessarily. Compared to age 35, a normal 65-year-old man has T roughly 25–50% lower — that's physiology. The key is that symptoms + labs align before considering intervention:

Low T without symptoms: monitor, don't treatMid-range T (300–400 ng/dL) with symptoms: lifestyle first (next step)Clear LOH (low T + 3 sexual symptoms): endocrinology / urology evaluation

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本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.

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