Vitamin C serums are noted for their collagen-stimulating and hyperpigmentation fading performance. However not all Vitamin C formulas are the same. According to peer-reviewed studies L-ascorbic acid reaches maximum skin saturation and collagen-stimulating effect at concentrations between 15% and 20%.(Pinnell SR, Yang H, Omar M, et al. (2001). “Topical L-Ascorbic Acid: Percutaneous Absorption Studies.” Dermatologic Surgery, 27(2), 137–142.)
The Dr. Louie Difference
I’ve used Vitamin C serums under my sunscreen in the morning and after cleaning my skin at night. My fair skin is prone to redness and hyperpigmentation and vitamin C has always been useful for eliminating stubborn discoloration. Typically, when it comes to fading discoloration patience is the key. One thing that sets Dr. Louie’s serum apart from other C serums is that visible improvements took less time to achieve. Another plus is that the vegan serum is lightweight and absorbs quickly into my skin. Since Vitamin C loses potency over time, I was impressed by the company’s dedication to posting the bottle dates of fresh batches on the vitamin C formula’s product page.
Vitamin C is effective on its own. To avoid irritating my skin I did not use it on days I used skincare actives such as retinol or exfoliating acids (AHAs and BHAs) as is often advised.
My sensitive skin didn’t experience any redness or irritation while using the serum. Users with sensitive skin will benefit from testing the serum on a small test area to see how their skin reacts to the potent formula.
Dr. Louie’s formula is worth a closer look if you are interested in using Vitamin C or are seeking to level up your use of Vitamin C from 10% to 20%. Visit the Dr. Louie website to learn more about this serum’s ingredient list along with answers to frequently asked questions.
