Kerassentials Review 2026: Ingredients, Evidence, Price & Safety

Short answer: Kerassentials is a topical oil with 5% undecylenic acid, tea tree oil and 15 other oils and extracts, sold for nail fungus. It costs $79 to $49 per bottle, with a 60-day refund from delivery, even for opened bottles. We found no trial of the product, and approved topical treatments clear toenails in only a minority.

What is listed, what the research says about each ingredient, what it costs, and what we could not verify.

Price, guarantee and shipping at a glance

Price: 2 bottles at $79 each ($158), 3 bottles at $69 each ($207), 6 bottles at $49 each ($294). US dollars.
Guarantee: 60 days from delivery. Send back all the bottles, opened or not, with the packing slip to Aurora, Colorado; you pay the return postage. Refunds take 5 to 10 days to process.
Shipping: US: $9.99 on 2 bottles, free on 3 and 6 bottles (5 to 7 working days). Canada, UK, Ireland, Australia and New Zealand: $15.95 (10 to 15 working days).

If you landed here searching for a yellowed, thickened, or fungus-prone toenail, you've probably already seen a dozen pages promising a "cure in 7 days." This isn't one of them.

Kerassentials is a topical oil — not a capsule — meant for daily use on the nail and surrounding skin. It combines several essential oils with a fatty acid, undecylenic acid, which the label gives at 5% and which is used in over-the-counter athlete's-foot products.

Below is what the manufacturer claims, what the research says about each ingredient, current pricing and, just as important, when this type of product is not the right answer.

Quick facts

FormatTopical oil
Volume0.5 oz / 15 ml
Directions4 times a day, per label
Ingredients17 on label, 1 amount
Guarantee60 days
Sold byBuyGoods (US)
ApprovalNo medicine approval found

See the official offer

Redirects to the manufacturer's official site

What the formula is meant to do

The label shows a blend of carrier oils, essential oils and undecylenic acid. Here is the role of each group and what we found.

UNDECYLENIC ACID (5%)

The ingredient closest to a medicine. The US over-the-counter monograph for athlete's-foot products lists 10 to 25% undecylenate, so 5% is below that range. We found no trial of it for toenail fungus.

ESSENTIAL OILS AND MENTHOL

Tea tree, lemongrass, clove, manuka, lavender, camphor and menthol are the active-style extras. Several show antifungal activity in the lab, and one small uncontrolled case series looked at a mentholated ointment. Reaching the infection under the nail is the problem, and these oils can cause skin allergy.

CARRIER OILS

Mineral, almond, flaxseed, canola, walnut, jojoba and chia oils carry the rest. We found no evidence that they treat nail fungus.

DIRECTIONS

The label says to apply 4 times a day with the brush, work it into the cuticle with a cotton swab, and file the nail surface with an emery board. External use only.

Kerassentials ingredients and composition (what the research says)

The label on the seller's page lists 17 ingredients, in this order: undecylenic acid USP (5%), mineral oil, sweet almond oil, organic flaxseed oil, tea tree oil, aloe vera leaf extract, canola oil, tocopheryl acetate, walnut oil, menthol, camphor oil, clove bud oil, jojoba oil, chia oil, lemongrass oil, lavender oil and manuka oil. Only undecylenic acid has an amount.

Ingredient	Amount	What the research says
Undecylenic acid USP	5%	Used in over-the-counter athlete's-foot products, at 10 to 25% undecylenate in the US monograph. A Cochrane review of foot skin infections found azole creams were no more effective than undecanoic acid. We found no trial for toenails. Approved topical toenail treatments clear the nail completely in about 1 to 18% of people. 21 CFR 333
Tea tree oil	Not stated	Lab studies show activity against the fungi that infect nails. In one 6-month trial, 100% tea tree oil cleared the fungus in about 18% of people, similar to a clotrimazole solution. It can cause contact dermatitis, especially when oxidised. Medical News Today
Menthol	Not stated	One small uncontrolled case series of a mentholated ointment (Vicks) in 18 people reported full cure in 5 (28%) at 48 weeks. It had no placebo group, and it is not this product. Review
Camphor oil	Not stated	The US FDA limits camphor in consumer products to 11% because of poisoning cases in children. The label says external use only and to keep out of reach of children. Pediatrics
Clove bud oil	Not stated	Contains eugenol. Topical clove oil can irritate the skin and has caused contact dermatitis. Overview
Lemongrass oil and lavender oil	Not stated	Antifungal activity is shown in the lab only. We found no human nail-fungus trial. Both have been reported to cause allergic contact dermatitis. PubMed
Manuka oil	Not stated	The seller's page cites lab studies of manuka and kanuka oils against microbes. We found no human nail-fungus trial.
Mineral, sweet almond, organic flaxseed, canola, walnut, jojoba and chia oils	Not stated	Carrier and moisturising oils. We found no evidence that they treat nail fungus. Walnut is a nut allergen.
Aloe vera leaf extract and tocopheryl acetate (vitamin E)	Not stated	Skin-feel and moisturising ingredients. We found no evidence that they treat nail fungus.

Kerassentials bottle and label showing suggested use, caution and the ingredient list with undecylenic acid USP 5%

The label as published on the seller's offer page.

Label note: the seller's sales text describes eight ingredients (without menthol, camphor, clove, manuka, canola, walnut, jojoba or chia), while the label image on the same page lists 17. Compare the label on your bottle with the one above. Bottom line on the evidence: we found no trial of Kerassentials. Even approved topical toenail medicines fully clear the nail in only a minority of people, and oral prescription treatment works better but needs a doctor. Cochrane review · AAFP review

Pros and cons, unfiltered

What's good

Topical application, with no capsules to swallow
The full 17-ingredient list is on the label, so each one can be looked up, and it states 5% undecylenic acid
Contains undecylenic acid, an ingredient used in over-the-counter athlete's-foot products
60-day money-back guarantee offered by the seller
Free shipping from the 3-bottle package

What to watch for

Only one ingredient has an amount, and we found no trial of the product
Even approved topical treatments fully clear a toenail in only a minority of people, and 5% undecylenic acid is below the OTC athlete's-foot range
Tea tree, lavender, lemongrass and clove oils can cause contact allergy, and the label warns to stop if irritation occurs
Applying 4 times a day plus filing the nail is a demanding routine
Nail results take months, since the nail has to grow out
The per-bottle price is higher on the 1 and 2 bottle options
Look-alike websites copy the official page

Kerassentials complaints, billing and refunds

We removed the seller's customer quotes from this page, because we cannot verify them and they describe curing a fungal infection. Independent feedback is thin. Reported complaints include no improvement after months of use, refunds taking weeks, and look-alike websites that copy the official page. There is a BBB complaints page for a company of this name, and a Trustpilot page for one of the look-alike sites. We could not verify how common these problems are.

Who sells it: the offer page says “BuyGoods is the retailer of this product”, and the checkout says “You are buying from BuyGoods (Customer Support: 302-404-2568)”, with the charge shown on your bank statement as “BuyGoods”. Product questions go to contact@kerassentials-product.com. Returns go to 19655 E 35th Dr #100, Aurora, CO 80011, USA, per the refund policy.

Before you pay

Use the official offer link and check the web address before you enter card details.
Check the final total at checkout, including shipping and any extra items.
For a refund, you send back all the bottles, opened or not, with the packing slip to Aurora, Colorado, USA, and you pay the return postage.
The box accepting the terms and refund policy comes pre-ticked at checkout, so read them first.
Take a screenshot of the price and guarantee wording, and keep your confirmation email.
If a charge looks wrong, contact the seller first, then your card provider or bank.

Packages and pricing

As with any offer sold direct from the manufacturer, the figures below are in US dollars and for reference. The exact price and what “each” covers show on the official checkout page and can change without notice.

Package comparison
Package	Price per bottle	Total	Shipping	Guarantee
2 bottles	$79	$158	+ $9.99 (US)	60 days from delivery, opened bottles accepted
3 bottles (2 + 1)	$69	$207	Free (US)	60 days from delivery, opened bottles accepted
6 bottles (3 + 3)	$49	$294	Free (US)	60 days from delivery, opened bottles accepted

Basic

2 bottles

$79/bottle

$158 total + $9.99 shipping

No bonuses included

Choose Basic

Most popular Three bottles of Kerassentials, shown with a bonus product jar

3 bottles (2 + 1)

$69/bottle

$207 total, free shipping

Marketed as 2 + 1 free, plus a surprise gift

Free shipping

Choose Most Popular

Best value! Six bottles of Kerassentials, shown with bonus guides and bonus product jars

6 bottles (3 + 3)

$49/bottle

$294 total, free shipping

+ 3 free digital guides & a surprise gift

Lowest cost per bottle

Choose Best Value

The offer page lists these totals: “TOTAL: $358 $158”, “TOTAL: $537 $207” and “TOTAL: $1074 $294”. The shipping policy lists free US shipping (5 to 7 working days) and $15.95 for Canada, the UK and Ireland, and Australia and New Zealand (10 to 15 working days). When we checked on 1 Oct 2026 from outside the US, the BuyGoods checkout showed the 3-bottle package at $207.00 plus $15.95 shipping, $222.95 in total. Prices are not converted to pounds or euros.

Check current pricing

Who it makes sense for — and who it doesn't

Reasonable to consider if: the problem is mild, a doctor has already looked at it, and you want a low-cost option with a refund window. Skip it if: you expect a proven cure, the nail is thick, painful or spreading, or you are allergic to essential oils or fragrance.

Talk to a doctor first if you:

Have diabetes or compromised circulation in your feet
Have already tried treating the nail for months with no improvement
Are pregnant or breastfeeding
Have a known allergy to essential oils, fragrance, eugenol (clove) or nuts (walnut oil), or react to tea tree oil (test a small area first and stop if the skin becomes red, itchy or sore)
Have a very thick, painful nail, or signs of infection (pus, intense redness, fever)

Frequently asked questions

What is in Kerassentials?

The label lists 17 ingredients: undecylenic acid USP (5%), mineral oil, sweet almond oil, organic flaxseed oil, tea tree oil, aloe vera leaf extract, canola oil, tocopheryl acetate, walnut oil, menthol, camphor oil, clove bud oil, jojoba oil, chia oil, lemongrass oil, lavender oil and manuka oil. Only undecylenic acid has an amount.

Does Kerassentials work for toenail fungus?

We found no trial of Kerassentials. Even approved topical treatments completely clear a fungal toenail in only a minority of people, and the research on tea tree oil and the other oils is limited. Expect a modest chance at best, and see a doctor for a thick, painful or long-standing infection.

How do you use Kerassentials?

The label says to apply 4 times a day (twice in the morning and twice in the afternoon) with the brush, work it into the cuticle with a cotton swab, and gently file the nail surface with an emery board. It is for external use only, and you should stop if irritation occurs.

What are the side effects of Kerassentials?

We found no safety study of the product. Tea tree, lavender, lemongrass and clove oils can cause contact dermatitis in some people. Camphor is toxic if swallowed, so keep the bottle away from children. Test a small area first and stop if the skin becomes red, itchy or sore.

How long before Kerassentials shows results?

A toenail grows slowly, so any change takes months to see. The seller's page says improvements can appear within weeks, but gives no trial data to back it up.

How does the 60-day guarantee work?

The refund policy gives 60 days from the day the order is delivered. Email contact@kerassentials-product.com with “Refund Request” in the subject, then send back all the bottles, empty or not and opened or not, with the packing slip to 19655 E 35th Dr #100, Aurora, CO 80011, USA. You pay the return postage, and the policy says refunds take 5 to 10 days to process.

Are there Kerassentials complaints?

Yes. Reported complaints include no improvement, slow refunds, and look-alike websites that copy the official page. We could not verify how common they are.

Is Kerassentials legit?

It is a real product sold through BuyGoods with a 60-day guarantee. We have not tested it, we could not verify the seller's claims, and its label gives an amount for only one ingredient.

Where should I buy Kerassentials?

The seller says it sells only through its official offer page. Look-alike sites exist, so use the official link and be careful with marketplaces.

Written by the Wellnyra editorial team

Last updated October 1, 2026 · Independent affiliate review, not affiliated with the manufacturer

What we did: read the seller's offer page, compared the packages, guarantee and shipping, and looked up published research on each ingredient. What we did not do: test the product, verify the seller's claims, or see the label on a physical bottle. We are not doctors or licensed healthcare professionals and this is not medical advice — see a doctor for diagnosis and treatment of nail or skin conditions.

Check the official offer

If you decide to try it, use the official link, check the final total and keep the 60-day terms. We found no evidence that it clears nail fungus, and a doctor can offer treatments with better evidence.

Visit the official Kerassentials site

Affiliate link · pricing and stock on the manufacturer's site

See Official Price