I heard vitamin B-6 can help block progesterone. During my last cycle I was taking 40mg of nolva a day and my nipples got a little swollen and sore. They have gone down since but I was wondering if it was due to progesterone and not estrogen.
Anyways, my question is is B-6 and injectable like B-12? And if so can you legally but it in Canada like you can with B-12?