How to help my wife?

Hi all,

Hoping you can help - my wife currently has a Ferritin level of 6, and it's been that low for years at this point. But other than prescribe her iron tablets (that don't make a difference to her levels), any medical professionals she's interacted with have said that either her levels are fine, or that she doesn't need an infusion.

It's massively frustrating her and has a large negative impact on her life, which is entirely unfair on her. I want to do everything I can to help, but other than shouting at the doctors, I'm at a bit of a loss.

Is there anything specific we should be saying to the doctors to make them take her issues more seriously? Any advice massively appreciated - we're based in the UK, for context!