Now after 89 trials, the company is rolling out the next generation of its Vitamin C-infused formula, billed as the company's largest formula renovation in 166 years. This advanced Kiehl's Powerful-Strength Line-Reducing Concentrate has a heightened concentration of 12.5% Vitamin C (10.5% Pure Vitamin C [L-Ascorbic Acid] and 2% Vitamin Cg [Ascorbyl Glucoside]), and is now made with hyaluronic acid. The new formula was clinically demonstrated to perform in an 8-week clinical study, and provides a fast-absorbing, non-oily texture. The product, which warms as it is applied on the skin, now features a pleasant citrus scent as well, from the addition of essential oils, said the company.
"Our renovated formula, now with hyaluronic acid and a greater amount of Vitamin C, provides faster, better results," said Dr. Geoff Genesky, scientific director at Kiehl's. "While vitamin C is difficult to stabilize within a formula, the team worked meticulously to stabilize even more vitamin C and deliver our most efficacious Powerful-Strength Line-Reducing Concentrate formula to date."