JWs don't take blood. they have an incredible history on this subject. they've won many times in court over the rt to refuse blood due to religious beliefs. that aside, u may wanna look into what alternatives do actually work.

“Medicine Without Blood,” about the ways that Jehovah’s Witnesses have changed how doctors think about blood transfusion.-- https://www.newyorker.com/news/news-desk/how-jehovahs-witnesses-are-changing-medicine

Pioneering Bloodless Surgery With Jehovah’s Witnesses-- https://wol.jw.org/en/wol/d/r1/lp-e/101991842