A single study showed a single statin reducing GLP-1 levels and ascribed it to gut microbiome changes that could be totally resolved with UDCA supplementation.

If this even ends up being reproduced it at most says there is an easy fix for people taking atorvostatin and that it might be a concern with other statins, but this should be treated with the same health skepticism of any other single study finding.

Not all statins raise blood sugar either - pitavastatin usually shows an improvement in insulin sensitivity.