Vitamin C, Vitamin E, and Ferulic Acid After Acne Scar Laser in 2026: What the Trial Means for People With Boxcar Acne Scars

If you have boxcar acne scars and plan fractional CO2 laser, the 2026 CE Ferulic trial matters for healing. The serum side healed faster with less redness and pigment at two weeks.

Boxcar scars are wider round or oval depressions with sharp vertical edges. CE Ferulic means 15% L-ascorbic acid plus 1% vitamin E stabilized by ferulic acid. The trial tested it right after laser on one side of the face versus saline on the other.

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 laser trial tested
Where boxcar scars fit in
Redness, pigment and barrier results
Who the findings fit best
What to ask before your laser appointment

What the 2026 laser trial tested

Shi, Xu and Zhang ran a randomized, investigator-blinded, split-face trial in 64 adults aged 18-50 with moderate-to-severe atrophic scars. The team tested CE Ferulic serum against saline after ablative fractional CO2 laser, as described by the Journal of Cosmetic Dermatology via PubMed Central full trial record.

The trial authors report complete scab loss by day 7 in 39 of 64 patients (60.9%) on the serum side versus 22 of 64 (34.4%) on saline, p=0.0026. That gap points to faster surface healing in the first week. Faster shedding can shorten the oozing and crusting window that worries many laser patients.

Where boxcar scars fit in

Boxcar scars are wider round or oval depressions with sharp vertical edges. Evidence indicates shallow boxcar and rolling scars respond more effectively to fractional CO2 laser than narrow deep icepick scars, according to Dermatology and Therapy trial and review summary.

That distinction matters for expectations. A shallow boxcar edge may smooth more visibly after resurfacing than a deep icepick tunnel. The serum did not change scar type, but it addressed the aftercare problems that delay return to work and school.

Redness, pigment and barrier results

ConsultantLive, reporting the trial, notes redness and pigment scores were lower on the serum side at days 3, 7 and 14. All comparisons showed P<.0001 coverage of Shi et al..

The same report notes better moisture and barrier readings by day 14. Skin hydration was higher on the serum side (P=.0367) and water loss was lower (P=.0246). Less water loss often means less tightness, flaking and stinging during recovery.

Who the findings fit best

The PubMed Central full text describes 64 patients in China with average age 29.5 years and all Fitzpatrick skin type IV. That profile faces higher risk of lasting post-laser dark marks. Lower pigment scores in this group carry practical weight.

Follow-up stopped at day 14 and measured scabbing, redness, pigment, hydration and barrier function. The Archyde summary of the design notes it did not measure long-term boxcar depth, volume or scar-score remodeling design and endpoints summary. Early healing looked better, but final scar smoothing remains unproven.

What to ask before your laser appointment

Ferulic acid helps stabilize the vitamin C and E mix. An earlier Journal of Investigative Dermatology study via Medscape found the mix doubled photoprotection from about 4-fold to 8-fold against simulated sun.

Daily sun protection still matters because laser-treated skin burns and darkens easily. Bring photos of your scars in plain daylight plus a list of retinoids, acids and bleaching agents. Bring a list of current retinoids, acids, and bleaching agents to that visit so pause dates and restart dates are clear.

Ask whether your clinic uses an antioxidant protocol after fractional CO2 laser
Ask start day, stops, sun protection, and makeup rules for the first 14 days
Ask how they track redness, pigment, infection, and prolonged crusting