Hi @Mimi1, I hope you don’t mind my jumping in briefly.
That’s a very common balancing act for people with Polycythaemia vera ('PV'). As well as getting some advice in this thread (thanks all) you might also find it useful to look at this post from another forum member who was navigating a similar challenge with iron levels after venesections.
And if you’d like to talk anything through and get some advice from our wonderful blood cancer nurses, our support team are there on 0808 2080 888 (option 1) or support@bloodcancer.org.uk.
Take care,
Ceri - Blood Cancer UK Support Services