Formulation Guide: Witch Hazel Toner with Multiple Actives

Yes, you can mix Witch Hazel Plus Allantoin with Centella [Madecassoside], Calendula, Vitamin B6, and Natto Gum to create a toner. All these ingredients are water-soluble, making them compatible with a Witch Hazel base.

Proportions

You can use each ingredient at its recommended maximum usage rate, but be mindful that combining several ingredients at high concentrations might result in a sticky texture on the skin. Here are the typical recommended usage rates for the ingredients you mentioned:

• Witch Hazel (Alcohol Free, Paraben Free) Plus Allantoin: 10-100% (for toner, usually >50%)
• Allantoin: 0.1-2.0% (recommended 0.5%)
• Centella Asiatica Extract (Madecassoside 90%): 0.1-2% (recommended 1%)
• Calendula Extract (Water Soluble): 1-5%
• Vitamin B6 (Pyridoxine Hydrochloride): 0.5-3.0%
• Natto Gum (Nutto Gum): 3-10% (recommended 5.0%)

Always refer to the specific product's documentation for precise recommendations and solubility limits.

Mixing Method

Since all these ingredients are water-soluble, the mixing order is not critical. You can add the ingredients directly into the Witch Hazel base. For ingredients in powder form (like Allantoin, Centella Asiatica Extract, Vitamin B6), ensure they are fully dissolved before adding the next ingredient. Vitamin B6 should be added without heat (below 40°C).

Preservative

You do not need to add an additional preservative. The Witch Hazel base, especially when used at a high concentration (over 80%) as is common for toners, contains its own preservative (Benzoic Acid). Additionally, Natto Gum also contains a preservative (Phenoxyethanol 0.7%). This should provide sufficient preservation for your formulation.