Our Phloretin Serum kit with L-Ascorbic Acid is the gold standard for vitamin C topicals. Check out today's Beauty Brains Blog for details. Our kit produces a serum with up to 20% l-ascorbic acid, the strongest available. And its pH of 3.0 makes it very stable, so it lasts much longer than competitive serums which oxidize pretty rapidly. While that pH is low, it's in the "goldilocks" range -- not too low to be excessively irritating, but low enough to be properly effective. And you can customize the strength if you prefer a more gentle approach.
Here's why you need a Vitamin C Serum: