Vitamin E for Scars: Three Trials With Different Answers

Before buying vitamin E oil for a surgical scar during GLP-1 treatment, ask which formula and which study support the claim. The trials below used different products, populations and schedules. A favorable result in one setting cannot supply instructions for another person's incision.

The 15-person study compared two parts of a scar

Baumann and Spencer's 1999 trial enrolled patients after skin cancer removal surgery. Different parts of each scar received Aquaphor alone or Aquaphor mixed with vitamin E, twice daily for four weeks. The study was double-blind; appearance was assessed at weeks one, four and twelve, including a blinded photographic review. [1]

The authors reported no cosmetic benefit from adding vitamin E and contact dermatitis in 33% of the participants. That reaction figure belongs to this small study and preparation; it is not an estimated rate for every vitamin E product. [1]

The within-scar comparison is useful because both treatments share the same person's healing circumstances. It still leaves a small sample and a specific surgical setting. I would not turn this trial into a prediction for an old burn scar or a different oil.

The larger trial analyzed 85 of 122 participants

Khoo and colleagues' randomized, double-blind study, published in 2011, compared 5% topical tocotrienol, a form of vitamin E, with placebo on recently healed surgical scars. Application began two weeks after surgery and continued twice daily for six weeks. The analysis included 85 people who completed four assessments: 45 in the tocotrienol group and 40 in the placebo group. [2]

Assessments extended to week sixteen after application began. Neither the Patient and Observer Scar Assessment Scale, the photographic ratings nor the laser Doppler blood-flow measurement showed a statistically significant difference between groups. No significant adverse effect was observed. [2]

The completer analysis and tested schedule limit what I would infer from this result. A nonsignificant difference does not prove identical effects.

The favorable pediatric result used a different schedule

Zampieri and colleagues' 2010 prospective, single-blind controlled study reported on 428 children ages two to nine across its groups. Vitamin E was applied three times daily for at least fifteen days before surgery and twice daily for at least thirty days afterward. The comparator was a petrolatum-based ointment. [3]

The proportion of patients or parents rating the cosmetic result very good was 96% with vitamin E versus 78% in the control group. The authors also reported no keloids in the vitamin E group, compared with 13 cases, or 6.5%, in controls after six months. [3]

My interpretation is that this pediatric program cannot establish benefit for an adult starting an oil on an existing scar. These studies establish no GLP-1-specific regimen.

Bring the scar and the bottle to the discussion

Describe the feature you want to change: height, color, itch, tenderness or texture. Ask the clinician to identify the scar type and explain which outcome a proposed treatment is meant to address. Photograph the ingredient list and bring your procedure's wound-care instructions.

For the earlier stages of care, see scar care after an injury or procedure. A scar that keeps growing needs a different discussion; read the keloid assessment guide.

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This article provides general education, not a diagnosis or an individual treatment plan. Medication information refers to US sources. Discuss medication, nutrition and cosmetic treatment decisions with qualified clinicians.