Board Thread:Questions and Answers/@comment-5441128-20180107220050/@comment-27700324-20180204203815

Dragonfly82 wrote: It was on Smallville where blue kryptonite would temporary their powers disappear which sucks that would helped Kara to have a human boyfriend or having a child or even children.

Blue Kryptonite usually hurts Bizzaro. So once again that is Smallville screwing with canon. Red Sunlight removes her powers in the real canon.