What it is
Hydrolyzed hyaluronic acid is hyaluronic acid that has been broken down into smaller fragments. Hyaluronic acid itself is a glycosaminoglycan found naturally in skin and connective tissue that binds and holds water, acting as a humectant. By chopping the large native molecule into lower-molecular-weight pieces, the hydrolyzed form retains moisturizing ability while its smaller size is intended to allow it to sit and act more readily within the upper skin layers.
Safety & warnings
Hydrolyzed hyaluronic acid is a humectant closely related to a substance the body makes naturally and is broadly used and well tolerated in moisturizing products. Note that with hyaluronic acid generally, molecular weight matters, and the science around how much smaller fragments penetrate is debated; in cosmetics it is used at low levels for its water-binding and skin-feel benefits.
Origin & sourcing
Hydrolyzed hyaluronic acid is made by breaking down hyaluronic acid through acid, enzyme, or other hydrolysis methods. The parent hyaluronic acid is now produced largely by bacterial fermentation rather than extraction from animal tissue; the fermented material is then hydrolyzed to lower molecular weights.
History
Hyaluronic acid, the parent molecule, was first isolated in 1934 by Karl Meyer and John Palmer from the vitreous humor of cattle eyes. Early production relied on animal sources such as rooster combs, but microbial fermentation has since become the dominant manufacturing method, enabling controlled production of hyaluronic acid and its lower-molecular-weight derivatives.
Questions everyone asks
How is hydrolyzed hyaluronic acid different from regular hyaluronic acid?
It is the same molecule broken into smaller, lower-molecular-weight fragments, which keeps its moisturizing ability while allowing it to work more readily in the upper skin layers.
What does it do in a sunscreen?
It is a humectant that binds water to help keep skin hydrated and improve the feel of the product.
Is hydrolyzed hyaluronic acid animal-derived?
Modern hyaluronic acid is mostly made by bacterial fermentation rather than from animal tissue, and the hydrolyzed form is produced by breaking that material into smaller pieces.