These are the Vitamin C Serums that I’ve tried that have a pH level below 6.0 (in alphabetical order by brand). I’ve also included a link to my review, where applicable

Please note that I use pH strips and they aren’t a perfect science so the pH levels noted below are estimates only. There is also some variation between batches of products and a manufacturer may have made changes to their formula since I tested..

The majority of the products listed below are also silicone-free and sulfate-free.

If you would like to learn more about a product please click on the link to see product details such as pricing, ingredients, etc. Most are affiliate links.

**If you are looking for referral links and codes to save on sites like SkincareRX, Curology, Glow Recipe and the like, please click here.**

• Cosmetic Skin Solutions CE Ferulic (pH of 3.25, results of my refrigeration experiment are here)
• Drunk Elephant C-Firma Day Serum (pH of 3.3-3.5, currently using; results of my refrigeration experiment are here and also some thoughts on the serum)
• Skinceuticals CE Ferulic (pH of 2.5-3.0, results of my refrigeration experiment are here)
• Timeless Skin Care 20% C+E+Ferulic Acid Serum (pH of 2.4, results of my refrigeration experiment are here)

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