I took it all summer this year started at 250mcg/day. I started with every day dosing for about 3-4 weeks. At week 4 I was pretty dark, people were wondering how the fuck I got so tan. I then maintained with maybe 1 shot of 250mcg/wk. I had some new moles form, which I don't like. Facial hair got noticeably darker. Didn't have any effect on erections. Also, I was outside every day working in the sun. So no need to use a tanning bed.