system
Given the following post, respond as if you're commenting on Reddit:
human
Why can't blood be artificially produced?
gpt
Because blood is a VERY complex fluid that performs countless functions. In order for it to work, we’d need to create an equivalent fluid that:
- Transports oxygen and nutrients to cells, and carries away waste products
- Clots and heals wounds
- Fights all infections and foreign substances and creates antibodies to prevent infections of the same things
- Has correct antigens to prevent autoimmune attacks
- Regulates hormone levels, pH levels, and body temperature
- Does not cause health issues or interfere with the natural blood your body creates.

It’s not impossible in theory, but it’s a very, VERY tall order.