Optimal pH and Usage for Capryloyl Salicylic Acid (LHA)
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What is the optimal pH range for Capryloyl Salicylic Acid (LHA) to be effective as an exfoliant, considering regulatory limits? Can it be used during the day and night, and what precautions are necessary, especially regarding sun exposure?
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# Optimal pH and Usage of Capryloyl Salicylic Acid (LHA)
For formulations containing Capryloyl Salicylic Acid (LHA), the optimal pH for its exfoliating activity is in the acidic range. According to regulations for products sold, the pH should not be lower than 3.5. A pH of 3.5 is generally considered effective for exfoliation.
It is important to note that using LHA at a lower pH can increase the potential for skin irritation. Therefore, while a lower pH might enhance exfoliation, it should be balanced against the risk of irritation, especially for sensitive skin.
Regarding usage during the day and night, LHA can be used both day and night. However, daytime use requires strict sun protection. Applying sunscreen is essential when using products containing LHA (or any exfoliant) during the day, as these ingredients can make the skin more sensitive to the sun. The suitability of daytime use also depends on your lifestyle and level of sun exposure. If you have significant sun exposure during the day, it might be better to limit LHA use to nighttime.
