When it comes to formulating sugar scrubs, it's important to include a preservative to prevent the growth of bacteria, mold, and yeast. This helps to ensure the product remains safe and effective throughout its shelf life.

One commonly used preservative in sugar scrubs is a broad-spectrum preservative called phenoxyethanol. It is effective against a wide range of microorganisms and has a good safety profile. Phenoxyethanol is also compatible with a variety of ingredients commonly found in sugar scrubs.

Another option is potassium sorbate, which is a natural preservative derived from sorbic acid. It is effective against mold and yeast and can be used in conjunction with other preservatives to provide broad-spectrum protection.

It's important to note that the choice of preservative may depend on other ingredients in your sugar scrub formulation, as well as any regulatory restrictions in your region. It's always a good idea to consult with a cosmetic chemist or formulator to ensure you choose the most suitable preservative for your specific formulation.