Blood makes up about 7-8% of a person's body weight.
✓ TRUE FACT
In an average adult, that’s roughly 4.5–5.5 liters of blood (depending on body size). Your body constantly recycles blood components; for example, red blood cells live about 120 days on average.
🤯 "Blood makes up about 7-8% of a person's body weight. You’re carrying more liquid than you think."