I used to get headaches every day,nothing on mri's,now im taking collagen and i noticed i dont get them as much,did i have brittle bones on my head?i had osteopenia but my calcium level was normal after taking it,taking it for 6 months,so is that why?

Whatever supplement you are taking may or may not have a direct connection to your headaches. It may be a coincidence or you may have has a dietary deficiency that supplement help resolve. I cannot buy into the notion that "brittle bones" in your head ever existed or were changed by the supplement. Be thankful life is better & keep doing what you are doing.