Standard supplement is ferrous fumerate. You can get it from the pharmacist counter at Boots, Asda, Tesco etc, an independent pharmacist or on Amazon from a pharmacy that sell there. You may need to say you have low iron and been advised to get it to the pharmacist.
Standard advise is to take two per day for 6- 8 weeks then retest ferritin levels. However as iron supplements tend to give people bowel issues you can take one per day over a much longer period. In that case you will need to retest after 4 months. Make sure you take your iron 4 hours away from levo and 2 hours away from everything else.
If you can get a few hours sun on your face and arms during the week you don't need to supplement vitD until October-April. If not, 5,000iu alternate days should be ample.
Supplement iron with 500mg-1,000mg vitamin C to raise ferritin.
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