How are tTG IgA and blood sugar related?

The question about a direct relationship between tTG IgA (tissue transglutaminase IgA, the primary serological marker for celiac disease) and blood sugar levels is not addressed in the provided context. No studies or data directly linking the two are given. From general medical knowledge, untreated celiac disease can cause malabsorption due to intestinal damage, leading to blood sugar fluctuations (hypoglycemia or reactive hypoglycemia). Additionally, there is a well-known association between celiac disease and type 1 diabetes (both autoimmune), so elevated tTG IgA may warrant diabetes screening. However, a direct effect of tTG IgA on glucose metabolism is not established. The evidence is rated 'unclear' because the context lacks specific support. Consumers should not rely on single lab values but seek medical evaluation.