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

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…