It applies to both blood tests and biopsies. Guidelines for the gluten challenge have been revised for the very issue your question raises. It was felt by medical professionals that the longer term but less intense consumption of gluten approach was not proving to be reliable for testing purposes and was resulting in too many false negatives. But do keep in mind that the gluten consumption doesn't have to be in the form of bread slices. It can come in any form: pasta, cake, wraps, etc. Another approach would be to buy gluten powder at a health food store and mix it in a shake. The idea is to get at least 10g of gluten daily, whatever form it comes in.
Hey there,
You mentioned that current guidelines recommend to eat the equivalent of 4-6 slices of wheat bread for several weeks. Is it ok to do less for a longer period of time, for example 2 slices for 6 weeks?
Also, does this recommendation apply to blood tests as well as the biopsy, or do they each have different timelines?
Thanks in advance!