Quick answer: According to the official label, Kerassentials contains 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 (vitamin E), walnut oil, menthol, camphor oil, clove bud oil, jojoba oil, chia oil, lemongrass oil, lavender oil and manuka oil. Each bottle holds 0.5 oz (15 ml).
The 8 “Featured” vs. the 17 on the Label
The Kerassentials sales page highlights 8 ingredients: lavender oil, organic flaxseed oil, almond oil, tea tree oil, lemongrass oil, aloe vera, tocopheryl acetate and undecylenic acid. Many review sites copy that list. But the bottle label shows 9 more: mineral oil, canola oil, walnut oil, menthol, camphor oil, clove bud oil, jojoba oil, chia oil and manuka oil. Those extras matter if you have allergies or sensitive skin.
Every Kerassentials Ingredient Explained (Label Order)
Ingredients on cosmetic labels are generally listed from the largest to the smallest amount, so the first few make up most of the bottle.
Undecylenic acid USP (5%)
A fatty acid originally made from castor oil. It is the active ingredient in many over-the-counter athlete's foot products, where the FDA allows 10–25% total undecylenate. Kerassentials lists 5%. Note that OTC antifungals for athlete's foot must state they are “not effective on the scalp or nails.” (21 CFR Part 333, Subpart C)
Mineral oil
A common, inexpensive base oil that spreads the formula and seals moisture into skin. It's listed second, so it's likely one of the largest components.
Sweet almond oil
A moisturizing carrier oil rich in fatty acids and vitamin E. Tree-nut source: ask a doctor if you have a nut allergy.
Organic flaxseed oil
Rich in alpha-linolenic acid (omega-3). Used in skin care to soften and condition.
Tea tree oil
The best-known plant oil for fungal skin problems. The NIH's NCCIH says research for nail fungus is too limited to draw conclusions, and that tea tree oil is toxic if swallowed. (NCCIH: Tea Tree Oil)
Aloe vera leaf extract
Traditionally used to soothe and moisturize dry or irritated skin.
Canola oil
A light carrier oil that helps the blend spread.
Tocopheryl acetate (vitamin E)
A stable form of vitamin E. Protects the oil blend from going rancid and conditions skin.
Walnut oil
A conditioning plant oil. Tree-nut source.
Menthol
Creates a cooling feeling that can make itchy skin feel calmer. Mentholated ointment was tried for nail fungus in a small case series; the AAD calls the evidence unclear.
Camphor oil
An aromatic ingredient in vapor-rub ointments. Can irritate sensitive skin and is toxic if swallowed.
Clove bud oil
Rich in eugenol, which shows antifungal activity in lab studies. A known skin sensitizer for some people.
Jojoba oil
A wax-like oil that resembles skin's natural sebum; helps keep cuticles supple.
Chia seed oil
An omega-3-rich plant oil used for skin conditioning.
Lemongrass oil
Contains citral; studied in the lab for antimicrobial activity. Can irritate skin at high strength.
Lavender oil
A soothing aromatic oil; lab studies show activity against yeasts and fungi.
Manuka oil
A New Zealand essential oil related to tea tree, studied in the lab against bacteria and fungi.
See the Full Kerassentials Label
Check the official site for the current label, package prices and the 60-day refund policy.
View Kerassentials on the Official Site → Opens the official Kerassentials order page (secure BuyGoods checkout). Prices checked October 8, 2026; confirm the total at checkout.How the Ingredients Group Together
| Group | Ingredients | Role |
|---|---|---|
| Active-style ingredient | Undecylenic acid 5% | Fatty acid with antifungal use in skin products |
| Essential oils | Tea tree, clove bud, lemongrass, lavender, manuka, camphor | Aromatic oils studied in the lab against microbes |
| Carrier oils | Mineral, sweet almond, flaxseed, canola, walnut, jojoba, chia | Spread the formula and moisturize |
| Skin conditioners | Aloe vera, vitamin E | Soothe and protect |
| Sensory | Menthol | Cooling feeling |
What the Ingredient List Doesn't Tell You
Apart from undecylenic acid (5%), the label doesn't give amounts for each oil. That makes it impossible to compare the essential-oil strengths with those used in studies. The seller's reference list is made up of single-ingredient studies, many done in test tubes, rather than a trial of the Kerassentials formula.
See a doctor or podiatrist promptly if…
the skin around a nail is red, warm, swollen, painful or draining pus; a nail is bleeding or lifting quickly; you have diabetes, poor circulation or a weakened immune system; or the problem is spreading. These need professional care, not a home oil.
Our Verdict on the Kerassentials Formula
The formula is a sensible blend for nail and cuticle conditioning: a fatty acid with antifungal use, a group of well-known essential oils and plenty of moisturizing oils. It is not a prescription-strength treatment, and its undecylenic acid level is below the OTC athlete's foot range. Check the label for allergens before you buy.
Frequently Asked Questions
What is the main ingredient in Kerassentials?
Undecylenic acid USP at 5% is the only ingredient listed with a percentage. Mineral oil and sweet almond oil appear next on the label, so they likely make up a large share of the bottle.
How many ingredients are in Kerassentials?
The official label lists 17 ingredients. The sales page features only 8 of them.
Does Kerassentials contain nuts?
Yes. It contains sweet almond oil and walnut oil, which come from tree nuts. Ask your doctor before using it if you have a tree-nut allergy.
Is Kerassentials all natural?
Most ingredients are plant oils, but the label also includes mineral oil (a petroleum-derived oil) and lab-made forms such as tocopheryl acetate and undecylenic acid USP.
How big is a bottle of Kerassentials?
Each bottle holds 0.5 oz (15 ml) and comes with a brush applicator. The seller describes each bottle as a 30-day supply.