Frequently Asked Questions
We’ve assembled some of the most frequently asked questions we receive from users like you. If you have any additional questions do not hesitate to contact us.
General Questions About Keresker
Some of the most common questions we get regarding Keresker.
Keresker is a topical antifungal designed to fight nail fungus and improve the appearance of nails. It’s different than most other topicals sold online in that it allows you to easily scrape away affected layers.
If you have or believe you have a fungal nail infection you should try Keresker. Keresker is the only formula we’ve seen that works fast and allows you to easily scrape away affected layers of the nail.* Keresker can be used in combination with other types of non-topical antifungals to help speed up the process of fighting nail fungus and improving appearance.*
Keresker works by softening up infected areas of the nail. Once these areas are softened up the antifungal agent can seep in and fight the fungus. You may also scrape these layers away. For more info please see how it works.
The number of bottles of Keresker you will need depends on a few factors. 1.) How many nails are affected. 2.) How severe is the fungal infection. 3.) Where is the fungal infection located.

Most people will need 3+ bottles.

If you only have one affected nail where the fungus is only on the suface of the nail you might be able to get away with using just 1 bottle.

Each bottle will last approximately 1 month per affected nail.

If you have anything greater than a mild surface fungus we recommend 3-5 bottles.
Primary Ingredients
Urea
Undecylenic Acid
Secondary Ingredients
Deionized Water
SD Alcohol
Cetyl Alcohol
Cetearyl Alcohol
Glycerin
Tea Tree Oil
Phenoxyethanol
Hydroxyethylcellulose
Keresker is more than just an antifungal. It has ingredients that empower the antifungal to work and get to where the fungus lives.

Many other topicals simply contain an antifungal and no way for it to actually reach the fungus. People often get frustrated with these topicals because there is little to no progress.

Each ingredient in Keresker has a purpose towards improving the appearance of your nails and fighting fungus. Supplementary ingredients in Keresker support the function of Urea and Undecylenic Acid by either enhancing their effect or preserving the integrity of the formulation.
Usage Questions
Learn how easy Keresker is to use. Get usage tips.
Simply apply twice a day. Once in the morning and once in the evening. Scrape your nail one to two times a week gently. There’s some great tips on our how to use guide. We’re happy to help anyone use Keresker. If you have a question about use feel free to contact us.
Most will see improvement within 10-14 days.* However for some it may take up to 6 weeks. If you’d like us to take a look at your nails please send pictures to support@keresker.com.
We recommend using Keresker for a week or two after your nails clear up. This is to prevent any reinfection. If you believe your nails are fungal free you may stop using Keresker.
Assistance / Support
Getting support and assistance to beat nail fungus can be extremely helpful since each case of fungus is unique. Our support staff is a small knowledgable team that can give you that extra edge against fungus. Feel free to contact us anytime!
Simply email support@keresker.com or fill out the contact us forum. Please include your order # if you have it.
Each person is unique. Your case of nail fungus is unique. We’re able to better help you if we can determine your needs based on your own case. Our support teams goal is to help you be fungal free. They’re knowledgable and help guide you to fungal free nails.
We’d love to talk or text with you! Please email us at support@keresker.com to set up an appointment for when we should call or text you!
Shipping
Common queries regarding shipping. We strive to get your package to you as soon as possible!
It usually takes 1 business day to ship. However it can take up to 3 business days to ship. We strive to get your package to you as quick as possible.
The package usually is in transit for 2-3 days. For international orders it may take a bit longer due to customs.
Check your email for your shipping tracking number or contact us.
Damaged Package / Returns
Extremely rare, your package may come damaged due to the USPS handling of it. Each item included in Keresker is extremely durable as well. Please contact us and we’ll help you with any damaged products.
Miscelleneous
Other questions users have had that did not quite fit into any other category above.
Nail fungus is a dermaphyte invasion of the nail. Dermaphytes feed on the nutrients present in your nail and then often reproduce.
The only way to be completely certain that you have nail fungus is to have a doctor take a sample of your nail and then send it off to a lab for testing. Many people will assume they have a nail fungus based on discoloration, texture, or brittleness of the nail.

Keresker may be a great place to start if you think you may have a fungal infection. If you’d like us to take a look at your nails we’d be happy to! Just email a photo of your nail with a description to support@keresker.com.
You can order Keresker by select a package on our order page. You’ll have to choose a package then click ‘order’.

You can pay by any major credit card or with paypal. Once your order is placed you will get an email with your order number. Once your order is shipped you will get a follow up email with your tracking information.
Contact Us for Assistance
If we were not able to answer your question above please feel free to reach out.