Home remedies and over-the-counter keloid products: what holds up

Search for keloid treatment and you will find pages of creams, oils, and kitchen remedies promising to dissolve a scar at home. Some of these products sit on solid evidence, most sit on marketing, and a keloid-prone person deserves to know which is which before spending months on something that cannot work.

Silicone is the one over-the-counter option with real support. Silicone gel and silicone sheeting are the standout: inexpensive, low-risk, and backed by decades of clinical use for keeping healing scars flat. They work by hydrating and regulating the scar as it matures, and they demand consistency, worn or applied daily for weeks to months rather than dabbed on occasionally (AAD, keloids self-care). Their strongest role is prevention and early care on a fresh, healing wound in a keloid-prone person, the same role they play in clinical scar prevention. Against a large, established keloid, silicone alone produces modest change at best.

Onion extract: popular, weakly supported. Onion extract is the active ingredient in some of the best-known scar gels, and the trial evidence is thinner than the shelf space suggests. A randomized, double-blinded study comparing an onion extract gel with plain petrolatum on new surgical scars found no advantage for the onion extract in scar appearance or symptoms (Chung et al., Dermatologic Surgery, PubMed). Some later studies report mixed results, but nothing that puts onion extract near silicone, let alone near clinic-based treatment.

Vitamin E: no benefit shown, and it can irritate. Vitamin E has a durable folk reputation for scars that the research does not share. In a controlled study on surgical scars, topical vitamin E did not improve cosmetic outcome, and roughly a third of participants developed contact dermatitis from it (Baumann and Spencer, Dermatologic Surgery, PubMed). For keloid-prone skin, an irritating remedy is worse than a useless one, because irritation is itself a small injury to skin that scars excessively.

The kitchen-cabinet remedies. Lemon juice, apple cider vinegar, crushed aspirin pastes, and similar home treatments have no meaningful evidence behind them for keloids, and the acidic or abrasive ones can inflame the scar and surrounding skin. One unglamorous home measure that is legitimate: sun protection. A keloid that tans darkens further and becomes more conspicuous, so covering it or using sunscreen while it is active is worthwhile care (MedlinePlus, keloids).

Why over-the-counter care rarely beats an established keloid. An established keloid is not a surface blemish; it is an active, collagen-producing process in the deeper skin, which is why the treatments that reliably flatten one, steroid injections first among them, work inside the scar rather than on top of it. Home care supports that work, it does not replace it, and months spent rotating through creams while a keloid grows is time taken from the early window when treatment is easiest.

The takeaway. Keep the home routine honest and simple: silicone used consistently, sun protection, and no picking or squeezing. Skip vitamin E and be skeptical of onion extract and kitchen remedies. And if a scar is raised, growing, itchy, or tender, put the money toward a dermatology visit instead of another tube, because that is where the treatments with real evidence live.

Related reading: Silicone sheets and pressure: preventing keloids before they form and Steroid injections: the first-line keloid treatment.