LHA vs BHA: Usage and Formulation Guide

Based on the information provided, here are the answers to your questions about LHA and BHA:

1. LHA Concentration Equivalent to BHA 2%

To achieve the effect equivalent to 2% BHA for dissolving clogged pores, you need 2% Active LHA. The LHA Liquid product contains 10% Active LHA. Therefore, you should use 20% of the LHA Liquid in your formula to get 2% Active LHA.

• Example Formula (Toner):
  • LHA Liquid: 20%
  • Distilled Water: 80%

2. Mixing LHA Liquid with Water

Yes, you can mix LHA Liquid directly with distilled water. You do not need emulsifiers like Light Cream Maker or TWEEN 20 for this purpose. While heat (70-80°C) can help the LHA Liquid dissolve more easily in water, it is not strictly necessary.

3. Replacing TWEEN 20 in BHA Formula

In the typical BHA (Salicylic Acid) formula you mentioned (Salicylic Acid 2.0%, Propylene Glycol 40%, TWEEN 20 3%, Distilled Water), TWEEN 20 is used to help prevent the Salicylic Acid powder from precipitating out of the solution. It acts as a solubilizer.

If you want to avoid using TWEEN 20, the staff suggests considering using LHA Liquid instead of Salicylic Acid powder. LHA Liquid is designed to be easily incorporated into formulas without needing specific solubilizers like TWEEN 20 to keep it stable.

4. Optimal pH for LHA

The optimal pH range for LHA to be effective is similar to BHA. It works best at an acidic pH, but the final product pH should not be lower than 3, in compliance with regulations.

5. LHA vs BHA for Blackheads/Whiteheads

• If your primary goal is solely to treat clogged pores like blackheads and whiteheads, BHA (Salicylic Acid) is generally considered more suitable and effective for this specific purpose.
• LHA has dual properties. It can help with clogged pores (similar to BHA) and also offers skin peeling benefits similar to AHA (like Glycolic Acid) but with potentially less irritation. LHA is a good choice if you are looking for both clogged pore treatment and gentle exfoliation/anti-aging benefits.

In summary, for targeting only blackheads and whiteheads, BHA might be the more direct choice. If you want a multi-functional ingredient that addresses clogged pores and provides gentler exfoliation than traditional AHAs, LHA is a good option.