Yes -- have seen it
Yes, dr. Rajan sankaran, an internationally known homeopathic physician and teacher from mumbai, has shown cases where vitiligo
improved through homeopathic treatment.
It requires careful case-taking by an experienced homeopath -- it's not a "take this for that" situation. Since your note says you're from la, robert gramlich md (family physician & homeopath) may be able to help you.