Bryan Johnson· Author
LH & FSH levels are normal, which is evidence that testosterone replacement therapy (TRT) is not being used.
The evidence is convergent. Multiple independent sources reach the same conclusion, the underlying mechanism is well-characterized, and even the field's most cautious voices treat it as worth doing.
LH & FSH levels are normal, which is evidence that testosterone replacement therapy (TRT) is not being used.
Every Sunday: the week’s new conflicts and verdict changes — and nothing else.
Native comments, Twitter mentions, and Reddit threads about this claim — surfaced together so the conversation isn't fragmented across platforms.
Bookmarking — the dossier-vs-overview split is the right call. Most of the time I want overview; sometimes I want receipts.
Would love a "what would change this verdict" RSS feed. Sign me up if it exists.
Recent serum testosterone concentration was 748 ng/dL and the 12-month average is 702.7 ng/dL.
My LH (8.7∓1.25 ng/dL) and FSH (7.4∓2.0 ng/dL), both measured three times in the last year, are consistently in the mid-high normal range with minimal fluctuations, further indicating natural hormone production.
My free testosterone, the active form crucial for sexual drive and anabolic function, consistently registers in the upper reference range (94∓6 pg/ml) based on three measurements over the past year. This is despite a slight elevation in SHBG (64.6, ∓2.7 nmol/L), measured seven times in the same period.
My average total testosterone is an ideal 704∓44 ng/dL.
My LH (9.7 IU/L) and FSH (7.4 mIU/ml) are also ideal.
I am 47 and have ideal levels of testosterone (735 ng/dL). I am not on TRT.
On this protocol, I’ve consistently maintained a mean testosterone level of 791 ng/dL, completely naturally. I am not currently on TRT, and I haven’t been for years.
Your testosterone levels are excellent. Approximately 75% of age-matched healthy men.
Would you be willing to provide bloodwork such as LH/FSH (gonadotropins) and hCG levels in tandem with a repeat testosterone to corroborate your claims?
I am 47 and have ideal levels of testosterone (735 ng/dL). I am not on TRT. My LH (9.7 IU/L) and FSH (7.4 mIU/ml) are also ideal. Evidence that I am not on TRT. These testosterone, LH and FSH measurements were taken 60 days ago, in Jan of 2025.