Differences in testosterone levels between 400 ng/dL and 600 ng/dL in males, or within normal ranges in females, may not necessarily lead to significantly different muscle mass.

“if I understood correctly, if a male is somewhere in the reference range, so typically I believe that's somewhere between 300 NOGS per deciliter and 900 NOGS per deciliter. Maybe in some countries it goes up to 1,200 but in any case that a male with 400 NOG per deciliter testosterone versus 600 it's not as if the male with 600 can make you know that much more muscle growth and the same is true for women.”