Stubborn Nail Fungus? Kerassentials Was Built Around the One Ingredient the FDA Actually Recognizes for This.

We can't promise it will work for every case — no honest seller of a topical product can. What we can say: the active ingredient, undecylenic acid, is recognized by the FDA under 21 CFR 333.210 for topical antifungal use, and every order is backed by a 60-day money-back guarantee so you can test it without financial risk.

Three official packages: 2 bottles for $158, 3 bottles for $207, or 6 bottles for $294. Shipping is $9.99 on the 2-bottle package; the 3-bottle and 6-bottle packages ship free, confirmed at checkout. All three carry the same 60-day money-back guarantee, and the 6-bottle package also includes three bonus digital guides.

Surface changes often appear within 4 to 6 weeks of consistent daily use. Full renewal — old nail replaced by new growth — takes about 9 to 12 months, the natural growth cycle for a toenail. Results vary from person to person.

The formula uses topical ingredients including tea tree oil, lavender oil, clove bud oil and undecylenic acid, a compound recognized by the FDA under 21 CFR 333.210 for topical antifungal use. Patch-test first and consult your doctor if you have known allergies, are pregnant, breastfeeding, or have a serious medical condition.

You have 60 days from purchase to request a full refund through BuyGoods, the official retailer, no questions asked. Keep your order confirmation email for the refund instructions. The guarantee does not apply to purchases made through Amazon or other marketplaces.

Kerassentials is applied topically, not swallowed, so it is a different risk category than an oral medication. If you have skin sensitivities, an autoimmune condition, or use topical steroids long-term, check with your doctor before starting.

The official page is the only place that guarantees the genuine product with the 60-day money-back guarantee — order through the button on this page. Kerassentials is not officially sold on Amazon, Walmart, eBay or any other marketplace. One detail you can check yourself: the official bottle is 0.5 oz / 15 ml, as printed on the label. Marketplace listings routinely advertise 1 oz / 30 ml bottles, and some sell under different brand names such as "Nature's NutriWave Kerassentials Oil." A different size on a different label is a different product — and none of those carry the 60-day guarantee. Our where to buy guide compares them side by side.

No topical product in this category is "FDA-approved" — the FDA approves prescription drugs, not cosmetic or topical support products. The manufacturer's facility is FDA-registered, which is different. The active ingredient, undecylenic acid, is recognized under 21 CFR 333.210.

No. They are two different products from two different companies, and the similar names cause a lot of confusion. Kerasal is a separate over-the-counter nail brand sold in pharmacies and major retailers. Kerassentials is the topical oil described on this page, sold through the official store only. Nothing on this page applies to Kerasal.

Yes. Checkout is handled by BuyGoods, an established US retailer, using encrypted payment processing. Card details are never passed to the manufacturer or to us.