We see literally 100's turn up on here with serious vitamin D deficiency after years on 800iu. It's not enough for a mouse
Better You vitamin D mouth spray is good as avoids poor gut function. Try 5000iu daily for 2-3 months. Aiming for around 100nmol. Will need maintenance dose after reach right level. Testing twice year to check. Trial and error what each individual needs.
Vitamibdtest.org.uk £28 postal kit
B12 injections obviously not enough. Push to increase frequency or supplement with sublingual B12 lozenges daily, plus a good vitamin B complex to keep B vitamins balanced and will improve folate too
If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 3-5 days before any blood tests, as biotin can falsely affect test results
Ferritin is dire. Ask for referral to haematology for iron infusion. How much ferrous fumerate are you taking?
Eating liver once a week should help improve
Your antibodies are high this is Hashimoto's, (also known by medics here in UK more commonly as autoimmune thyroid disease).
About 90% of all hypothyroidism in Uk is due to Hashimoto's
Hashimoto's affects the gut and leads to low stomach acid and then low vitamin levels
Low vitamin levels stop Thyroid hormone working
Poor gut function can lead leaky gut (literally holes in gut wall) this can cause food intolerances. Most common by far is gluten
According to Izabella Wentz the Thyroid Pharmacist approx 5% with Hashimoto's are coeliac, but over 80% find gluten free diet helps significantly. Either due to direct gluten intolerance (no test available) or due to leaky gut and gluten causing molecular mimicry (see Amy Myers link)
Have they done blood test for coeliac? It's notoriously unreliable, but worth asking for before going strictly gluten free. Endoscopy is only reliable test, but often need to wait months.
But don't be surprised that GP or endo never mention gut, gluten or low vitamins. Hashimoto's is very poorly understood
Changing to a strictly gluten free diet may help reduce symptoms, help gut heal and slowly lower TPO antibodies
Id like to add a lttle bit about iron. If you are taking supplements, that could be one reason why your having hard stools. I personally found liquid iron supplements to be helpful as well as drinking lots of water. My doctor also put me on birth control due to heavy periods in prder to stop the periods and build up my iron stores and also see if it will regulate itself out. Just another thought if yourdoctor hasnt tried this. Your symptoms of heavy periods to none could possibly be a sign of stress and or symptoms of auto immune? I had similar issues myself and am still learning. Anyway hope ypu feel better soon.
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