I've always been fairly hairy (except for my scalp) and it seems like I get a lot more hairy when out in the heat and sun all the time. Over the winter spending a lot of time indoors my arm and leg hair thinned a noticeable amount. But this summer I work outdoors 20 hours a week and my arm and leg hair is as hairy as its ever been. I take Iodine supplements also and am balding. I have started some scalp painting and curious to see what the results may be.