Bump up your thiamine dose!  You can take more if you don't feel anything after the first one.  Must needs getting to that 500mg. We need more thiamine when we're fighting an infection.  Zinc will help fight infections, too, as well as Vitamin C. They all work together. Hope you feel better!

Welcome to the forum, @MagsM, I had Meniere's.  Meniere's is caused by deficiencies in Thiamine, Niacin, and Vitamin D.  Celiac Disease causes malabsorption which affects all the essential vitamins and minerals. The B vitamins work in concert together like an orchestra.  Having a Folate deficiency suggests other B vitamin deficiencies as well.  Folate needs Pyridoxine B6 and Thiamine B1 to work properly with Cobalamine B12.  Doctors are not required to take many courses in nutrition, and often don't recognize deficiency symptoms or how to correct them.  Blood tests are not an accurate measurement of vitamin deficiencies inside cells.  Low iron correction requires copper and zinc as well as Thiamine and Riboflavin.    Yes, anemia can affect the production of antibodies and cause false negatives on tests for Celiac.  Diabetes and Thiamine deficiency can also cause false negatives.  An endoscopy with biopsy would be a more accurate method of diagnosis for you.   I studied Nutrition before earning a degree in Microbiology because I wanted to know what the vitamins were doing inside the body.  Vitamins are chemical compounds that the body cannot make, so we must get them from food and supplements.  After a few vertigo episodes and suddenly going deaf for a while, I researched and found that supplementing with  Thiamine in the form TTFD (tetrahydrofurfuryl disulfide), Niacin and Vitamin D resolved the issue.   Please ask your nutritionist for further vitamin deficiency tests.  A B Complex, TTFD, Vitamin D should help you recover quickly.   Keep us posted on your progress!

Thank you! This is very useful info!  

I have done some research about MK and gluten. I found a site that lists all the products that have am ingredient derived from gluten and what it is. The problem is I don't know how old the information is. I used some Laura Geller make up and had a severe skin reaction. My face is red, has non-pimple raised spots on it and my face burns. I need a makeup line that is gluten-free. One I can trust.  Thank you!!

I didn't notice a lot of difference, if any. But after only one pill I don't expect miracles. I'm also recovering from a pretty bad cold so that's a factor that will have some influence too I guess. I'll keep trying the Thiamine in the coming days and will let you know if I feel improvement. Thanks for asking btw!!