Log in
Thyroid UK
93,671 members107,695 posts

Low white blood cells, low thyroid and B12

Hi, my partner has low thyroid, low B12 and low white blood cells. Since I've known him he's never really been Well! Lots of colds, coughing, no engery etc

He also gets upset stomachs and has recently been checked for bowel cancer (awaiting results, but the hospital said it all looked promising!)

He has B12 injections and takes levothyroxine and T3 (bought online) they don't seem to know why he has low white blood cells.Any help would be great .Thanks

5 Replies

Essential to test vitamin D, folate, ferritin and B12.

Always get actual results and ranges. Post results when you have them, members can advise

Hashimoto's affects the gut and leads to 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)

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







Low stomach acid can be an issue

Lots of posts on here about how to improve with Apple cider vinegar or Betaine HCL





Other things to help heal gut lining

Bone broth




For full evaluation you ideally need TSH, FT4, FT3, TT4, TPO and TG antibodies, plus vitamin D, folate, ferritin and B12 tested

See if you can get full thyroid and vitamin testing from GP. Unlikely to get FT3

Private tests are available


Medichecks Thyroid plus ultra vitamin or Blue Horizon Thyroid plus eleven are the most popular choice. DIY finger prick test or option to pay extra for private blood draw. Both companies often have money off offers.

All thyroid tests should be done as early as possible in morning and fasting and don't take Levo in the 24 hours prior to test, T3 twelve hours prior, delay and take straight after. This gives highest TSH, lowest FT4 and most consistent results

Link about antibodies



Thanks for your reply, will definitely get him to get the tests done 😁



Low wbc is usually caused by a viral infection but persistent low wbc can be congenital or due to illness disrupting bone marrow production.


1 like

Thanks for your help 😁

1 like

Something I discovered. Not sure if it is relevant or not. But my white blood cells have always been low. more specially the the lymphocytes. I stand to be corrected but when you have an autoimmune thyroid condition it is the lymphocytes that attack the thyroid...something about T Helper lymphocytes. Something to research.

1 like

You may also like...