What is Sodium Benzoate? It is the sodium salt of benzoic acid. Although produced synthetically for cosmetic purposes, it has a natural role model: Benzoic acid occurs in many fruits, particularly rich in cranberries, blueberries, and plums, to protect them from spoilage. In cosmetics (and also in food as E211), it is a proven, mild preservative that is particularly valued in natural cosmetics.

Sodium benzoate has a very specific area of application. It is not a "cure-all," but a specialist that performs at its best under certain conditions.

• The pH Requirement: It only works in an acidic environment. The pH value of the product must be below 5.5 (ideally below 5.0) for the effective benzoic acid to be released.
• Spectrum of Activity: It is particularly strong against bacteria and some yeasts.
• Team Player: Since it is often not sufficient alone against all molds, it is almost always combined with other mild preservatives (such as potassium sorbate) to ensure complete protection.

Why is this synthetic substance used so often in certified natural cosmetics?

The Advantages:

• Food Grade: As an approved food additive, it is considered safe and well-researched.
• Good Tolerance: It is considered skin-mild and has a low allergy potential compared to many older preservation systems.
• Environmentally Friendly: It is readily biodegradable.