How testosterone changes after 40 (and what actually helps)
Testosterone does drift down with age, but slowly. Weight, sleep and general health shape how steep that decline is.
Topic
Testosterone
How testosterone changes, what affects it and when testing makes sense.
Does testosterone affect sex drive? Separating myth from mechanism
Testosterone matters for desire, but mostly at the low end. Above a fairly modest level, sleep, mood, medicines and relationships usually do more of the work.