Today I got an email from a Watchtower apologist whining about this article presentation implying JWs fraudulently claim to abstain from transfusion of plasma. He said "You know perfectly well cryosupernatant is mostly water and jehovah does not ask us to abstain from water."
Just for sake of future readers I'm going to attach a few pieces of information relevant to that brand of rationalization:
1. Whole blood is mostly water. Depending on a person's level of hydration the mass of water in blood ranges from 80% to 90%. The typical level is around 85%.
2. Fresh frozen plasma (what cryosupernatant and cryoprecipitate are rendered from) is mostly water. Typically fresh frozen plasma has a water mass of about 93%.
3. Cryosupernatant is mostly water. Because cryosupernatant is 99% of fresh frozen plasma its water mass is within 1% of the water mass of fresh frozen plasma.
Conclusion: If "mostly water" means "abstain from [name your substance]" can be ignored then we can accept [name your substance] whenever [name your substance] is "mostly water". Whole blood is "mostly water". Plasma is "mostly water".