Phosphate Buffered Saline

Phosphate Buffered Saline (PBS), also known as phos-buffered saline or phos-buffered salt solution, is a sterile, buffered solution of sodium phosphate and potassium phosphate. It is used in cosmetics as a solvent, carrier, and pH buffer.

As a solvent, PBS can dissolve other ingredients in cosmetics, including active ingredients, fragrances, and preservatives. It helps ensure that these ingredients are evenly distributed in the product.

As a carrier, PBS aids in the even spreading of other cosmetic ingredients on the skin, allowing for better application and absorption.

Additionally, PBS serves as a pH buffer, maintaining the desired pH range of a cosmetic product. This is crucial for the stability of the formulation and the optimal functioning of active ingredients.

Phosphate buffered saline is considered to be a safe and non-irritating ingredient, making it suitable for sensitive skin. It does not typically cause skin sensitivities or allergic reactions in most individuals. However, performing a patch test before using a new product is always recommended, especially for individuals with sensitive skin.

In summary, phosphate buffered saline (PBS) is a versatile ingredient used in cosmetics as a solvent, carrier, and pH buffer. It is safe for sensitive skin, as it is non-irritating and does not commonly cause skin sensitivities. Patch testing is still advisable before using a product containing PBS or any new ingredient, particularly for individuals with sensitive skin.