NaturePreserve™ Ultra Usage and Vitamin C Compatibility

Based on the information available regarding NaturePreserve™ Ultra (Gluconolactone & Sodium Benzoate):

• Usage around the eyes: Yes, NaturePreserve™ Ultra can be used around the eyes. The recommended usage rate of 1.25% is suitable for all product types, including those for the eye area.

• Compatibility with Vitamin C: The manufacturer's information specifically advises against using NaturePreserve™ Ultra with Vitamin C (L-Ascorbic Acid). While this warning explicitly names L-Ascorbic Acid, it is recommended as a precaution to avoid combining NaturePreserve™ Ultra with all forms of Vitamin C, including derivatives such as Perfect-C™ (Ascorbyl Tetraisopalmitate), Ascorbyl Glucoside, and Ascorbyl Palmitate. This is because the Sodium Benzoate component in NaturePreserve™ Ultra could potentially react with Vitamin C to form benzene, although this reaction is primarily documented with L-Ascorbic Acid and is still a subject of debate. To ensure maximum safety, it is best to avoid combining Nature Preserve Ultra with any type of Vitamin C in your formulation.