ELI5: Explain Like I'm 5

Aesculus hippocastanum

Aesculus hippocastanum is a big tree that has big leaves and produces big brown nuts. The tree is also known as a horse chestnut tree.

The nuts of the aesculus hippocastanum are very special. They contain something called escin. Escin can help make your blood vessels stronger and stop swelling. When people have swelling in their legs, they can use a cream made from escin to make the swelling go down.

People used to use aesculus hippocastanum nuts to feed their horses. But today, we mostly use them for medicine. So, when you see a big horse chestnut tree, remember that its nuts are there to help people feel better!