Longer follow-up must show whether early calmer healing becomes shallower rolling scars, stable pigment, and less need for repeat laser or subcision. Rolling acne scars are broad, wave-like depressions pulled down by fibrous bands under the skin. The 14-day result shows less redness and less early darkening on the antioxidant-treated side, but not lasting scar remodeling.
The evidence comes from a split-face trial in Chinese adults aged 18-50 with moderate-to-severe atrophic acne scars, described in the U.S. National Library of Medicine trial record. One cheek received CE Ferulic serum after ablative fractional CO2 laser, while the other cheek received normal saline. Both sides were followed for 14 days.
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 two-week trial tested
- Why early redness and pigment control matter
- Why rolling scars need more than laser alone
- What longer follow-up must prove in 2026
What the two-week trial tested
The trial applied the assigned treatment immediately after laser and continued daily care through early wound healing. The design compared the same person's two cheeks, which reduces differences from age, skin type, and sun exposure. It focused on recovery measures, not final scar shape.
The antioxidant side had smaller rises in erythema index on Days 3, 7, and 14, with differences of -11.1%, -8.6%, and -7.6% versus saline, according to the Journal of Cosmetic Dermatology trial text. All three differences had p values below 0.0001. The same trial text reports greater reduction in melanin index on the CE Ferulic side, meaning less early laser-induced darkening.
Why early redness and pigment control matter
Redness tracks inflammation and blood-flow change after ablative laser. Lower erythema during the first two weeks can mean a smoother recovery, less discomfort, and easier return to work or school. It does not prove that a depression has filled in.
Early pigment control matters because laser heating can trigger excess melanin, especially during healing. Vitamin C helps post-laser repair by scavenging reactive oxygen species, limiting tyrosinase-driven melanin production, and supporting collagen and elastin production by fibroblasts. The tested formula builds on work by Lin and colleagues, who found that adding 0.5% ferulic acid to 15% L-ascorbic acid plus 1% alpha-tocopherol stabilized the vitamins and doubled protection from about 4-fold to 8-fold against simulated solar redness and sunburn cells, as summarized in the Medscape abstract of the Journal of Investigative Dermatology study.
Why rolling scars need more than laser alone
Rolling scars stay depressed because fibrous bands anchor the skin downward. Laser resurfacing removes tiny columns of surface tissue and stimulates collagen, but it does not cut those deeper anchors. That mechanical limit explains why surface treatment alone often leaves rolling texture.
Guidelines therefore advise releasing the tethering with subcision before or along with resurfacing, according to the Skin Therapy Letter review. Subcision uses a needle or cannula under the skin to free the band. A person with broad rolling cheeks may need release first, then laser for surface smoothing.
What longer follow-up must prove in 2026
A 14-day check captures wound healing, redness, and early pigment. Durable rolling-scar change needs months of collagen formation and often 2-4 ablative fractional laser sessions under expert consensus.
Longer studies should separate temporary swelling and redness from measured depth change. For people with rolling scars, useful follow-up should report: Ask the clinic how it will measure depth, when it will photograph under the same light, and what threshold would trigger subcision rather than another laser pass. Keep strict photoprotection after ablative treatment because new skin darkens easily.
- measured scar depth or volume at three, six, and twelve months
- return of tethering or waviness after initial improvement
- persistent redness, lasting dark marks, and sun-protection use
- need for another laser session, subcision, or alternative treatment
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