A 2026 split-face trial tested a vitamin C, vitamin E and ferulic acid serum after ablative CO2 laser for acne scars. The treated cheek healed faster with less redness and pigment, which signals lower hyperpigmentation risk for skin of color, as HCPLive reported.
Atrophic acne scars are depressed pits left after collagen loss. Ablative fractional CO2 laser drills tiny columns into skin to rebuild collagen. That controlled injury brings scabs, redness and two weeks of barrier repair.
Medical information disclaimer: This article is for general educational purposes only and does not provide medical advice, diagnosis, or treatment. Always consult a physician or other qualified health professional about symptoms, medications, tests, or treatment decisions.
Table of Contents
- What the 14-day trial tested
- Why faster healing matters for deeper skin tones
- What to ask your dermatologist
- How to protect healing skin after laser
What the 14-day trial tested
The trial enrolled 64 Chinese adults ages 18 to 50 with moderate-to-severe atrophic scars. Doctors applied CE Ferulic serum to one cheek and saline to the other cheek. Both sides received treatment for 14 days right after laser. The serum side shed scabs earlier during recovery.
It also showed lower erythema and melanin indices than saline. Investigators concluded the mix may aid repair and curb post-inflammatory hyperpigmentation, according to the U.S. National Library of Medicine PubMed record. Medical Dialogues reported better moisture maintenance and lower water loss on day 14. The formula pairs 15% L-ascorbic acid with 1% alpha-tocopherol and 0.5% ferulic acid to fight free radicals and support collagen, per SkinCeuticals.
Why faster healing matters for deeper skin tones
Post-inflammatory hyperpigmentation means dark spots after inflammation or injury. It is the most frequent laser complication in Fitzpatrick types IV to VI. Healing speed, redness and melanin activity in the first two weeks help predict it. A systematic review found up to 92% of type IV and higher patients develop it after ablative CO2 resurfacing.
Spots sometimes last a year, as summarized in a PMC review. Laser injury raises water loss until the barrier reseals. Better moisture hold on day 14 signals a stronger barrier. A stronger barrier supports repair and comfort.
What to ask your dermatologist
The trial followed 64 Chinese adults for 14 days, with funding from L'Oreal and serum supplied by SkinCeuticals, per the PubMed Central disclosure. That short focus means results speak to early healing, not year-long scar remodeling. People with other backgrounds should treat it as promising early data for discussion, not a guarantee.
Bring the trial printout to your visit. Ask how the serum would fit your laser plan and aftercare. Stop any new active and call the clinic for spreading redness, pain, swelling or new dark patches. Do not start the serum on broken skin without direct medical direction.
- Do my scars and skin type match the trial group
- How would you time serum with my laser plan
- What signs of irritation or darkening should I report
How to protect healing skin after laser
NYU dermatologist Arielle Kauvar recommends tinted broad-spectrum sunscreen with iron oxides before and after laser. She gave that advice for skin of color in the AJMC interview. Tinted formula blocks ultraviolet plus visible light to lower hyperpigmentation risk.
Keep the area moist as directed and avoid picking scabs. Wear a wide-brim hat for midday sun and reapply sunscreen as directed. Book follow-up visits to track redness, pigment and scar change.
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