Blood plasma makes up about 55 percent of whole blood. Plasma is about 90 percent water. The other 10 percent is proteins, minerals, nutrients, hormones, waste products, ...

The use of blood and plasma donations with higher levels of PFAS is a “big controversy,” according to study co-author Dr. Bruce Lanphear. The Red Cross, however, did not express much concern.

Plasma exchange is a well-established treatment for certain blood disorders, autoimmune diseases and neurological conditions, and it’s typically covered by insurance when deemed medically necessary.