---
title: Facts about our brain
description: "INTERESTING FACTS ABOUT OUR BRAIN: An adult brain weighs ap­prox­i­mately 1 – 1.5 kg, the brain’s vol­ume is ap­prox­i­mately 1.6 litres, we have around 100,000,000,000 brain cells, in­tel­li­gence has noth­ing to do with brain size ..."
---

[Hochdorf Inside](https://inside.hochdorf.com/en)

# [Facts about our brain](https://inside.hochdorf.com/en/facts-about-our-brain)

 Written by [Janny Vedder](https://inside.hochdorf.com/en/author/janny-vedder) | May 18, 2018 1:26:01 PM

- An adult brain weighs ap­prox­i­mately 1 – 1.5 kg.
- The brain’s vol­ume is ap­prox­i­mately 1.6 litres.
- We have around 100,000,000,000 brain cells.
- In­tel­li­gence has noth­ing to do with brain size.
- An adult brain makes up 2% of body weight and ac­counts for around 20% of our oxy­gen con­sump­tion and 23% of our en­ergy re­quire­ments.
- A child’s brain triples in size in the first 3 years of life.
- The brain is made up of 50 – 60% fat. *[DHA](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/docosahexaenoic-acid/)* ­accounts for around 25% of the fatty acids, with *[AA](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/arachidonic-acid/)* ac­count­ing for 15%.
- The most im­por­tant nu­tri­ents for the brain are [*Vi­t­a­min A*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/vitamin-a-1/) and [*D*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/vitamin-d-1/), the trace el­e­ments [*iron*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/iron/), [*io­dine*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/iodine/), [*cop­per*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/copper/), [*se­le­nium*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/selenium/) and[*zinc*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/zinc/) as well as the [*omega-3*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/omega-3-fatty-acids/) *[fatty acid](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/fatty-acids/)* [*DHA*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/docosahexaenoic-acid/) and the [*omega-6*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/omega-6-fatty-acids/) fatty acid [*AA*](https://www.hochdorf.com/en/babycare/glossary/glossary-detail/term/arachidonic-acid/).

Fur­ther In­for­ma­tion

- Ar­ti­cle ["Omega-3 fatty acid DHA in in­fant nu­tri­tion"](https://inside.hochdorf.com/en/omega-3-fatty-acid-dha-in-infant-nutrition?hsLang=en)
- Short article "[In­ter­est­ing facts about our brain](https://inside.hochdorf.com/en/facts-about-our-brain?hsLang=en)"

 

[View full post](https://inside.hochdorf.com/en/facts-about-our-brain)

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