Vitamin C, Vitamin E, and Ferulic Acid After Acne Scar Laser in 2026: Sample Size and Evidence Limits for People With Rolling Acne Scars

A January 2026 split-face trial tested vitamin C, vitamin E, and ferulic acid serum after ablative fractional CO2 laser in 64 adults, as reported in the Journal of Cosmetic Dermatology trial. For people with rolling scars — wide, shallow scars with sloping edges — it shows faster wound healing, not proven long-term scar flattening. CE Ferulic means a serum combining 15% L-ascorbic acid, 1% alpha-tocopherol, and 0.5% ferulic acid. The trial applied it to one side of the face and saline to the other for 14 days after laser.

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.

What the 2026 trial tested
How much faster did skin heal?
Why does rolling type change the reading?
What do older antioxidant studies add?
How should rolling-scar patients use this evidence?
Frequently Asked Questions

What the 2026 trial tested

The trial enrolled 64 adults aged 18 to 50 with moderate-to-severe atrophic acne scars. Each person received ablative fractional CO2 laser, then CE Ferulic on one cheek area and normal saline on the other. Investigators assessing healing did not know which side received serum.

Scar severity was graded by ECCA score, a clinical acne-scar scale. The study did not report separate results for rolling scars. That choice matters because rolling scars were mixed with boxcar and icepick types.

How much faster did skin heal?

Complete scab detachment by day 7 occurred in 39 of 64 patients on the serum side versus 22 of 64 on saline, a gap reported by ConsultantLive covering the Shi trial. The difference was statistically strong at p=0.0026. Faster detachment signals quicker surface wound closure.

The serum side also had lower redness and pigment scores at days 3, 7, and 14, plus higher hydration and steadier barrier function, according to the trial abstract in PubMed Central. Lower melanin index means less early darkening after laser injury. Better hydration supports comfort during scabbing and peeling.

Why does rolling type change the reading?

Rolling scars sit wide and shallow, often tethered by fibrous bands below. The 2026 trial measured whole-face healing, not depth change in tethered rolling scars. So a person with mainly rolling scars cannot read healing speed as scar removal.

Laser response also differs by subtype. One ablative CO2 study found rolling and superficial boxcar scars responded best, while a 1550-nm nonablative study reported median scar-count drops of 59.2% for boxcar, 40.6% for rolling, and 19.1% for icepick, as reviewed in the Springer Dermatology and Therapy review. Subtype mix therefore shapes visible improvement. Ask your clinician which subtypes dominate your cheeks or temples.

What do older antioxidant studies add?

A 2016 split-face trial in 15 healthy adults aged 30 to 55 applied CE Ferulic after fractional ablative CO2 for photodamage. Treated skin healed more rapidly and showed higher basic fibroblast growth factor at day 5. Growth factor is a repair signal, not proof of scar flattening.

Foundational photobiology work found that adding 0.5% ferulic acid doubled UV protection from 4-fold to about 8-fold for combined vitamins C and E. That test measured sunburn redness and sunburn cells, not acne scars. It helps explain antioxidant interest, but it does not extend scar results.

How should rolling-scar patients use this evidence?

Treat CE Ferulic as a post-laser healing aid, not a rolling-scar cure. The key limit is 14-day wound follow-up in one Chinese patient group, without long-term collagen or depth measures. Pigment control and barrier support are practical gains after ablative laser.

Confirm your scar mix: rolling, boxcar, icepick, or mixed.
Ask what your clinic uses after fractional CO2 and why.
Plan strict sun protection during healing, plus prescribed gentle cleansing and moisturizing.
Track redness, dark spots, scab loss, and texture at 2 weeks, then scar depth over months.

Frequently Asked Questions

Will CE Ferulic erase my rolling scars?

No trial proves that. The 2026 study shows faster scab loss, less redness, and less early pigment change over 14 days, not lasting depth change.

Is faster scab loss worth asking about?

Often yes after ablative laser. Quicker closure can mean less discomfort and lower visible pigment risk, especially when paired with sunscreen.