Welcome to the forum, Alimunir.
Thyroid peroxidase antibodies are positive for autoimmune thyroid disease (Hashimoto's) which causes 90% of hypothyroidism. There is no cure or treatment for autoimmune disease but you may be able to slow progression by adopting 100% gluten-free diet which may also improve symptoms and reduce antibodies.
Did your doctor test TSH, FT4 and FT3 to check your thyroid function?
I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.