For example, both increasing or decreasing the rate of bone resorption affects energy balance and
testosterone, apparently via undercarboxylated osteocalcin, showing that
departures from «normal» in both directions are effective, and thus that «normal» is within the effective range.
The key is that you're noticing a
departure from your what you perceive as «normal» for you, and if you're noticing significant changes that leave you dissatisfied, let's see if low
testosterone is at the source — you don't have to live with the effects of low
testosterone.