Using Aloe Vera in Sunscreen Formulations

Based on your question about adding Aloe Vera to sunscreen formulations (waterproof/non-waterproof, with physical/chemical sunscreens), the recommended product to use as an active ingredient additive is Aloe Vera Extract (extraction ratio 10:1 FullAssay™).

• This is a water-soluble extract, suitable for incorporating into the water phase of your cream or lotion formula.
• The recommended usage rate is 1-10%.

Mixing Procedure:

Mix the Aloe Vera Extract into the water phase of your formulation. Ensure the final pH of your formula is between 3.5-7.

Formula Stability:

Aloe Vera Extract is an electrolyte. Adding electrolytes can sometimes affect the viscosity and stability of emulsion systems (creams/lotions), potentially causing them to soften or separate, especially if the formula uses thickeners or emulsifiers that are sensitive to electrolytes. Therefore, it is important to test the stability of your specific sunscreen formulation after adding the Aloe Vera Extract. You may need to adjust your emulsifier or thickener system to ensure stability, particularly in complex formulas like sunscreens which contain various ingredients (UV filters, film-formers for waterproofing, etc.).

Use with Different Sunscreen Types:

The effect of Aloe Vera Extract on your sunscreen formula is primarily related to its compatibility with the overall base emulsion system (the interaction between the water phase, oil phase, emulsifiers, and thickeners), rather than having a direct impact on the specific type of UV filter (physical or chemical) or waterproofing polymers. Maintaining a stable emulsion is key, regardless of the sunscreen type.