What it is
This is a carboxymethylated derivative of hyaluronic acid supplied as the sodium salt, which improves its water solubility and stability compared with unmodified hyaluronate. Like other hyaluronic acid forms, it attracts and binds water, so in a sunscreen it helps condition the skin surface and supports a hydrated, comfortable feel. It adds moisturizing character without an oily residue.
Safety & warnings
Hyaluronic acid derivatives of this kind are generally very well tolerated, with low irritation and sensitization potential. The ingredient is not comedogenic and is not a known fragrance allergen.
Origin & sourcing
Derived from hyaluronic acid (typically produced by fermentation) that is chemically modified by carboxymethylation and neutralized with sodium.
Questions everyone asks
How does this relate to hyaluronic acid?
It is a carboxymethylated derivative of hyaluronic acid, modified to improve water solubility and stability while keeping its moisture-binding ability.
What is its role in a sunscreen?
It serves as a humectant and conditioning agent that helps the skin feel hydrated and comfortable.