willow bark

Member exclusive Q&A: What should be the pH of our finished products for willow bark extract?

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In yesterday’s post, we started a discussion on the pH of our products when using AHAs. Today, let’s take a look at willow bark as per Marta’s question in the January Q&A! I’m a big fan of willow bark extract as it contains all that lovely salicylic acid, but it’s far easier to use in...

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Member exclusive Q&A: What should be the pH of our finished products for fruit acid complex?

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In the January Q&A, Marta asked: What is the recommended pH for a facial product containing fruit acid complex or willow bark extract? You have discussed concerns about a pH being too low in formulations containing (straight) alpha hydroxy acids or salicylic acid. Yet, should one be reducing the pH in a product containing fruit acid...

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