In short
Hyaluronic acid is a natural part of skin that helps keep it hydrated, elastic and firm.
What it is1
Hyaluronic acid can bind a large amount of water.
Chylińska N
Worth knowing2
The amount of hyaluronic acid in skin falls with age and with a lot of sun exposure, and the skin loses moisture.
Chylińska NHow hyaluronic acid behaves depends on the size of its molecules.
Chylińska N
Sources
These pages describe what the sources say. They cannot say what is going on with your skin.
See what is going on with your skin.
A one-minute scan on your iPhone, a plain answer mapped to your face, and what helps, with its source. Free to start.