Rhonda Allison C-Peptide Complex

The C-Peptide Complex uses l-ascorbic acid, the active, bioavailable form of vitamin C that the skin can use directly without any conversion step. This is the form with the most clinical evidence behind it for antioxidant protection, collagen stimulation, and melanin suppression. At 20%, it is dosed at a concentration that delivers meaningful results. The complex also contains magnesium ascorbyl phosphate, a stable vitamin C derivative, for added antioxidant support.

Palmitoyl tripeptide-5 is a signaling peptide that mimics the body's natural collagen-stimulating messengers, prompting the skin to increase its own collagen synthesis. Over time, this can help improve firmness and reduce the appearance of fine lines. When combined with l-ascorbic acid, which also supports collagen production, the two actives reinforce each other's structural benefits.

Apply it in the morning on clean, dry skin before your moisturizer and SPF. Morning use makes the most of its antioxidant protection, positioning the l-ascorbic acid to neutralize free radicals from UV and pollution throughout the day. If you are not using any other corrective actives at night, it can also be used as an evening step.

L-ascorbic acid at 20% is potent, and some skin types may need an adjustment period. Rhonda Allison recommends mixing the complex with a moisturizer or epidermal growth factor to buffer the experience for more reactive skin. Starting with once-daily use and monitoring how your skin responds is a sensible approach before moving to twice-daily application.

Yes, and prevention is actually one of the strongest cases for this complex. Antioxidant levels in the skin naturally decline starting in your twenties, leaving collagen increasingly vulnerable to UV-induced degradation. Using a daily vitamin C serum before visible damage accumulates helps preserve what you have. The palmitoyl tripeptide-5 adds an active collagen-building layer that supports long-term skin density.

Fructooligosaccharides are a prebiotic ingredient that selectively feed beneficial bacteria on the skin's surface, supporting a balanced microbiome. A healthy microbiome is directly tied to a more resilient skin barrier, which improves the skin's ability to retain moisture and defend against environmental stressors. In a corrective complex like this one, that added barrier support helps the skin tolerate active ingredients more comfortably.

L-ascorbic acid is sensitive to light, air, and heat, all of which can cause it to oxidize and lose potency. Store the complex in a cool, dark location, away from direct sunlight and humidity. The airless pump dispenser helps limit air exposure with each use, but keeping it out of a warm bathroom environment will extend the active life of the formula.

Art of Skin Care is an authorized retailer of Rhonda Allison, so every product you receive is 100% authentic, sourced directly through official brand channels and never from third-party resellers. Our team is made up of licensed, acne-certified estheticians who hand-select the products we carry based on real skin science and professional results. We don't just sell skincare; we understand it. Not sure if Rhonda Allison C-Peptide Complex is right for your skin? Get a free skincare consultation and one of our estheticians will personally guide you.