system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: how does cancer actually kill people?
gpt
The cancerous cells require massive amounts of nutrients and energy to continue reproducing and building blood vessels to the newly formed cancer cells. The depletion of energy and nutrition from the rest of the body causes strain on other necessary processes and results in some of these processes shutting down or performing below standards required to support life. This effect gets snowballed until entire organs get damaged and destroyed.