Different methods for antibody testing

[mjinder]

I have had tests done with Medichecks in early August, and again this week. Early September I had some tests done in France (where I have been for a few months).

The results in France showed normal antibody levels - I was celebrating! I assumed strict gluten free had worked. But I just got my Medichecks results, and they show they are the highest they have ever been...

I can see that in France they have used a different testing method. But surely this wouldn't result in such a different result?

Thyroglobulin antibodies since May

May 357 (tests in the US)

August 654 IU/mL (Medichecks in the UK) Method Roche Modular

Sept 3.8 UI/mL (lab in France) Method Chemiluminescence

October 771 IU/mL (Medichecks) Roche Modular

Anyone have any insight to these methods and the France one? I am worried I need to discount all the other labs I had done in France (vitamins, minerals, inflammation)

[greygoose]

Antibodies fluctuate all the time. It is meaningless. They just happened to be that level when you were in France, and went up again when you got back to the UK. Nothing to do with testing methods, just the nature of the beast.

[Treepie]

Once you know you have Hashimotos there is no point testing antibodies again although test packages do.

[Lora7again]

My Thyrogloblin antibodies are 4000 and have been like that for several years they do sometimes drop a little. I was fixated on it at first and my CRP which is now 9 but I now go by how I am feeling and touch wood I feel fine at the moment.