Did you know your blood actually contains about 0.2 milligrams of gold ? It’s not enough to make you rich, but it’s a fun piece of biological trivia .

Research often focuses on specific components rather than the "whole blood" you see in a vial. This includes: The liquid that carries nutrients and hormones. Platelets: Essential for studying blood clotting.

You can't just sell your blood on a whim for research. Most research blood comes from volunteer donors who give consent. For instance, the Stanford Blood Center notes that about 95% of their donors are happy to let their blood be used to advance medicine. 4. The Future: Artificial Blood

The stars of immunotherapy and vaccine research. 3. Ethical Sourcing