Praise be to Allah.
Hyaluronic acid is a substance that occurs naturally in different places in the body, but it is more concentrated in certain fluids in the body, such as fluid in the eyes and fluid in the joints.
In addition to the natural form of this acid, there are also forms that are produced in laboratories; they are usually made using a specific type of bacteria.
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Ruling on using hyaluronic acid
There is nothing wrong with using creams and moisturisers containing this acid, if it is free of harm. It is preferable to use hyaluronic acid of vegetable origin.
Ibn al-Jawzi said: With regard to medicines that remove freckles and beautify the face for the husband, I do not see anything wrong with them."(Ahkam an-Nisa’, 160).
And Allah knows best.