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Hi! I am newly returned to the list with a real stumper. Help?!

Before a person who has been GF goes for a biopsy, gluten is consumed
for the sole purpose of damaging the intestinal villi. If not enough is
consumed, or if it is consumed for too short an interval, there is a
risk of the villi being "too healthy" and a false negative biopsy.

Along the same lines, I understand that certain supplements, including
zinc, vitamins A and E, and aloe vera, among others, can be used to help
heal and encourage regrowth of damaged epithelial (skin) and endothelial
(gut) tissue. My question is, if such supplements are used, could their
good effects result in enough regrowth of villi to cause a false
negative biopsy? And if they have been used, what time period should
elapse after they are discontinued, prior to biopsy?

Any opinions or hunches are welcome, but if you have sources I could
refer to, that would be even better. Thanks.

-Jenise in Pittsburgh, PA, USA