What is Mederma Scar Care Gel and what types of scars does it treat?
Mederma Scar Care is a topical gel formulated to visibly improve the appearance of scars. Its active ingredients are 10% onion bulb extract (Allium cepa) and 1% allantoin. It is suitable for both new and old scars resulting from acne, surgery, C-sections, burns, and injuries. For new scars, apply once daily for 8 weeks starting once the wound has fully closed. For older established scars, use once daily for 3 to 6 months. Mederma was developed by Merz Pharmaceuticals in Germany and first marketed in 1997. It is the number one doctor- and pharmacist-recommended scar brand in the United States.
What are the active ingredients in Mederma Scar Care and how do they work on scars?
Mederma Scar Care contains two key active ingredients. Onion bulb extract at 10% provides quercetin and kaempferol, bioflavonoids with anti-inflammatory properties that help normalize collagen synthesis and reduce the excessive collagen deposition that creates raised or discoloured scars. Allantoin at 1% promotes skin cell turnover and regeneration by accelerating the shedding of damaged cells and stimulating healthy cell proliferation. Together, these two actives address both the inflammatory component of scar formation and the cellular renewal needed to gradually remodel scar tissue. The gel base includes aloe vera leaf juice, which provides additional soothing and moisturising support.
How should Mederma Scar Care be applied and who is it suitable for?
Apply Mederma Scar Care once daily with gentle massage until fully absorbed. For new scars, begin application only after the wound has completely closed; use for 8 weeks. For old scars, use once daily for 3 to 6 months — consistent daily use is essential for results. Suitable for facial and body scars from acne, surgery, C-sections, burns, and injuries in adults and children. Do not apply to open wounds or broken skin. If skin irritation occurs, discontinue use. The gel is fragrance-containing, so those with fragrance sensitivity should perform a patch test first.
What makes Mederma Scar Care different from other scar treatment products?
Mederma is the only scar topical with a published randomized controlled trial (2012) specifically on new post-surgical scars showing an average 36% improvement in scar appearance after 8 weeks of once-daily use. This is a clinical outcome for the finished product, not just ingredient research. It is the number one scar brand recommended by dermatologists and pharmacists in the United States, a status based on survey data from healthcare professionals rather than a self-reported brand claim. The combination of 10% onion extract and 1% allantoin in a non-silicone gel base differentiates it from silicone sheet or silicone gel scar products. Mederma is formulated by Merz Pharmaceuticals, a dedicated dermatology company with over 100 years of history, bringing pharmaceutical-grade development to an OTC scar product.
What is Mederma and does it work on scars?
Mederma is a topical scar treatment brand developed by Merz Pharmaceuticals in the mid-1990s and launched in 1997. Its active ingredients are 10% aqueous onion extract (Allium cepa) — containing anti-inflammatory quercetin and kaempferol — plus 1% allantoin, which promotes skin renewal. A randomized, controlled clinical trial published in 2012 found that Mederma Advanced Scar Gel produced a 36% improvement in the appearance of recent post-surgical scars at 8 weeks. Clinical results are more established for newer hypertrophic and post-surgical scars than for older or deep scars.
How is Mederma different from other scar treatment products?
Mederma is one of the few scar gel brands backed by published peer-reviewed clinical data from a randomized controlled trial measuring its specific formulation — not merely its individual ingredients in isolation. Its combination of 10% onion extract and 1% allantoin is a proprietary Merz Pharmaceuticals formulation with decades of dermatologist use. While silicone sheet products are generally preferred for keloid scars, Mederma's gel format is easier to apply to irregular or moving body areas, giving it a distinct clinical use case that dermatologists continue to recommend.
The information provided above is for reference purposes only and has not been reviewed or approved by Health Canada. It does not constitute medical advice and should not replace consultation with a qualified healthcare professional.