Have lived with under active thyroid for 5 years and had 1 bout of anaemia in the past which was treated with solution ferrous fumerate . Recent bloods this year show I'm a little low in iron and again require treatment. How do I know what is 'a little low' what is normal levels I feel fine. My new Dr refuses to prescribe liquid solution and prescribed tablets which advise additional advice if taking thyroxine .will I feel unwell or have to increase my thyroxine. Am a little reluctant. Any similar experience would be appreciated for a better understanding.