My eyebrows have become bushier since I got copper toxic/adrenal fatigued even though I also suffer from sub-clinical hypothyroidism.
Maybe it's just part of ageing normally as I am now 28 and was 24 when I first got the AF symptoms and my hair started to grow longer on my whole body since last year. It's definitely not hirsutism as my body hair was much less than other people my age so I guess mine just sprouted late, don't look like a gorilla though :]