If u have low ferritin, supplements aren't working and your gp won't help - and you have cash - a private clinic in London is offering iron infusions for £650. Is kosher, and might help some. I don't have any links with them, just read it in the Mail. Called The Iron Clinic, run by Prof Toby Richards, a surgeon at UCL. Will come up if you google it. I think yr ferritin has to be under 30 to qualify for treatment, with symptoms.