An Open Label Clinical Trial to Evaluate the Efficacy and Tolerance of a Retinol and Vitamin C Facial Regimen in Women With Mild-to-Moderate Hyperpigmentation and Photodamaged Facial Skin

This 2016 open-label, single-center clinical trial evaluated the efficacy and tolerability of a dual-product regimen comprising a 0.5% encapsulated retinol treatment and a moisturizer containing 30% tetrahexyldecyl ascorbate (vitamin C), along with vitamin E and coenzyme Q10, in 44 women aged 35–60 with mild-to-moderate facial hyperpigmentation and photodamage over 12