Hi and thank you for getting in touch. 

I'm sorry, but we cannot recommend any supplements or vitamins during your treatment as there is no evidence to suggest that they are safe to use. While there are no well-researched interactions with vitamins and tamoxifen, we still advise that you speak to your consultant, breast specialist nurse (CNS), or GP before taking any supplements. They will have a better understanding of your medical history and condition and can provide you with the best advice.

I've posted a link from one of our pages which I feel may be of interest to you if you haven't seen it already. 

Please get back to us if you need any more information or support.  You may find it helpful to talk things through with one of the nurses on our helpline.  The number to call is Freephone 0808 800 4040 and the lines are open from 9am till 5pm Monday to Friday.

Best wishes

Tina