Peter Attia· MD
if you look at my arm when you're 20 18 to 24 that's when we start to study reproductive your testosterone's like up here in the 40s for women right and then it kind of goes down like I wish I could do it better but it declines and by the time you're in like those late 30s early 40s is about half of what like if you look at normal ranges studies that have tried to of what you were when you were 18 and then it levels off at somewhat lower in your 40s and 50s and actually goes up a little bit past 60 and kind of levels off like down there so if you're on birth control pills that curve is way down and so woman a woman at 40 might be much more sensitive to that effect than she was if she was on a birth and TR bill of 25 and that difference in her testosterone or free testosterone may be significant in that she'll come and say like I have no sex drive right or I have no General sensitivity