Is It Possible To Live Without Sunlight?

Published: November 11, 2019
Dear TeenHealthFX,
Do we need sunlight in its own right, or is it only for producing Vitamin D? I know that it's impossible for most people, but if we could get enough Vitamin D from food, then would we be able to live without sunlight?
Signed: Is It Possible To Live Without Sunlight?

Dear Is It Possible To Live Without Sunlight?,

TeenHealthFX thanks you for asking such a thought-provoking question. In short, we cannot live without sunlight. Even though we can get Vitamin D from fortified foods, the sun does much more than that! If you are interested in learning more - read on. 

Humans can live without direct sunlight for quite some time. Think of people who live in Alaska and sometimes only have sunlight an hour a day! However, the sun is responsible for helping keep humans, animals, and plants alive through its UV waves. If we did not have the sun, it would be extremely cold and eventually everything would begin to die. According to the National Science Foundation, some planets that are far away from the sun are approximately 450 degrees BELOW zero! Can you imagine how cold that is?! 

What the sun also provides is the ability for plants to grow. We all need some sort of plant to survive, animals included. If animals did not have plants to feed off, then animals would no longer exist. As a result, humans would not have plants or animals and it creates a large domino effect that could cause all forms of life to become nonexistent. We hope this helps answer your question!  

Signed: TeenHealthFX