Is Sodium Hyaluronate natural?

Produced by bacterial fermentation (Streptococcus/Bacillus strains) of the hyaluronic acid biopolymer, then neutralized to the sodium salt. No petrochemical route is used commercially.

Sodium hyaluronate is commercially produced through a well-established microbial fermentation process, primarily utilizing strains of *Streptococcus zooepidemicus* or other suitable bacteria. This biotechnological route is the dominant method for producing cosmetic-grade sodium hyaluronate globally.

The fermentation process begins by cultivating the selected bacterial strain in a sterile bioreactor containing a nutrient-rich medium. This medium is typically composed of renewable carbon sources, such as glucose or sucrose, along with nitrogen sources, vitamins, and minerals essential for bacterial growth and hyaluronic acid synthesis. The bacteria metabolize these substrates, and through their enzymatic pathways, they synthesize hyaluronic acid.

Key enzymes involved in the biosynthesis of hyaluronic acid include hyaluronic acid synthase (HAS), which catalyzes the sequential addition of N-acetylglucosamine and glucuronic acid residues to a lipid carrier molecule embedded in the bacterial cell membrane. The reaction proceeds intracellularly, and the polymer is extruded through the cell membrane into the fermentation broth.

Following the fermentation period, which can last for several days, the bacterial cells are separated from the broth, typically through centrifugation or filtration. The hyaluronic acid, now present in the liquid phase, is then purified. This purification involves several steps, including precipitation (often using organic solvents like ethanol), filtration, and ion exchange chromatography to remove residual proteins, nucleic acids, and other impurities. Finally, the purified hyaluronic acid is converted to its sodium salt form, sodium hyaluronate, by treatment with a sodium source, such as sodium hydroxide, and then dried, often through lyophilization or spray drying, to yield the final powdered product.

Sodium hyaluronate is a popular ingredient in skincare products, often praised for its incredible ability to attract and hold moisture. Think of it as a super-hydrator for your skin. It's a salt form of hyaluronic acid, which is a naturally occurring substance found in our bodies, particularly in our skin, eyes, and joints, where it plays a crucial role in keeping tissues lubricated and hydrated.

In cosmetics, sodium hyaluronate is produced through a sophisticated fermentation process, similar to how yogurt or beer is made, but using specific bacteria. These bacteria are fed simple sugars derived from plants, like corn or wheat. The bacteria then naturally produce hyaluronic acid. This process is highly efficient and sustainable, as it relies entirely on renewable plant-based resources. After fermentation, the hyaluronic acid is purified and converted into its sodium salt form for use in your favorite serums, moisturizers, and other skincare items.