Terms of service

Last updated: 18 September 2026

1. Introduction and acceptance

These Terms of Service (the "Terms") form a legally binding agreement between you and Prolong Lab, UAB, trading as OnyGuard ("OnyGuard", "we", "us", "our"), and govern your access to and use of onyguard.com, any OnyGuard checkout, landing page or funnel, and all products and services we offer (together, the "Site").

By accessing the Site, creating an account, or placing an order, you confirm that you have read, understood and agree to be bound by these Terms and by our Privacy Policy. If you do not agree, do not use the Site.

Section 28 contains a binding arbitration agreement and a class action waiver that apply to customers in the United States. Please read it carefully — it affects how disputes between us are resolved.

2. Who we are

Prolong Lab, UAB Dominikonų g. 11, LT-01131 Vilnius, Lithuania Company registration number: 307116099 Value Added Tax identification number: LT100017808315 Email: support@onyguard.com Telephone (toll-free, United States): +1 (888) 530-7470

3. Eligibility

You may use the Site and buy from us only if you are at least 18 years old and able to enter into a legally binding contract. By placing an order you represent that you meet these requirements. If you are using the Site on behalf of a company, you represent that you are authorised to bind that company to these Terms.

We do not knowingly sell to anyone under 18.

4. Changes to these Terms

We may update these Terms. The version published on the Site at the moment you place an order governs that order. Changes take effect when posted, and your continued use of the Site after that constitutes acceptance. Where a change materially reduces your rights, we will give notice before it applies to you.

5. Your account

If you create an account you are responsible for keeping your login details confidential and for all activity under your account. Tell us immediately at support@onyguard.com if you believe your account has been accessed without your permission.

You agree to give accurate, complete and current information. We may suspend or close any account that contains false information, is used to breach these Terms, or is used for unauthorised resale.

6. Products, descriptions and availability

Our products are cosmetic and personal care products for external use on nails, feet and skin. They are not medicines.
We try to describe our products and display their colours accurately, but we do not warrant that descriptions, images, packaging or other content are error-free, and actual packaging may differ from images shown.
Product availability is not guaranteed. We may limit quantities, refuse or cancel any order, and discontinue any product at any time.
Where we cancel an order you have already paid for, we refund you in full.

7. Pricing, currency and taxes

Prices are shown in the currency selected on the Site and may change at any time without notice. The price that applies to your order is the price displayed at the moment you complete checkout.
We make every effort to price accurately. If a product is listed at an incorrect price due to an error, we may cancel the order and refund you in full, even after the order is confirmed.
Prices exclude shipping unless stated otherwise. Any shipping charge is shown before you pay.
Customs duties, import taxes and local charges on deliveries outside the country of dispatch are your responsibility. See our Shipping Policy.

8. Promotions, discounts and offers made after you order

Promotional codes, bundles and free-gift offers are subject to their own stated terms, cannot be combined unless we say so, have no cash value, and may be withdrawn at any time.
We may present additional offers after you have submitted your first order — for example an upgrade, an extra unit, or a bundle. These are separate purchases. No additional charge is made unless you accept that offer by clicking the button that confirms it. The price, quantity and any subscription terms are disclosed on the offer before you accept.
You can decline every post-purchase offer and still receive the order you originally placed.
Any free or discounted item received as part of a promotion is taken into account when calculating a refund. See our Return & Refund Policy.

9. How a contract is formed

Placing an order is an offer to buy. Our order confirmation email acknowledges that we have received it — it does not create a contract. The contract is formed when we dispatch the product. Until then we may decline the order for any lawful reason, including suspected fraud, pricing error, stock shortage, or suspected resale.

10. Payment

Payment is taken at checkout by our payment processors. We do not store full payment card numbers.
You confirm you are authorised to use the payment method you provide.
If a payment is reversed, charged back or fails after dispatch, you remain liable for the amount owed and we may suspend your account and refuse future orders.
If you believe a charge is wrong, contact us first at support@onyguard.com. We resolve almost all billing questions within one business day, which is faster than a bank dispute.

11. Subscriptions and automatic renewal

Some products can be bought on a recurring plan ("subscribe and save"). These are automatically renewing subscriptions. Read this section before you subscribe.

11.1 What you are agreeing to

When you select a subscription at checkout, you authorise us to charge your payment method automatically, on a recurring basis, at the interval and price shown at checkout, until you cancel. Before you pay, we show you clearly and conspicuously:

the price of each recurring shipment;
how often shipments and charges occur;
that the plan renews automatically until cancelled; and
how to cancel.

Your consent to these terms is obtained separately from your consent to the rest of the order.

11.2 Price and interval

Subscription pricing is discounted against the one-time price. The discount applies for as long as the subscription remains active.
Delivery intervals are selected at checkout. You can change the interval at any time.
We will give you at least 7 days' notice by email before any change to your subscription price or interval takes effect, and you may cancel before it applies.

11.3 Renewal reminders

We send a reminder email before each renewal charge, giving you time to skip, pause, change or cancel.

11.4 Managing and cancelling

You can cancel at any time, and cancelling is as easy as subscribing. You may:

use the Manage Subscription link in your order confirmation and renewal emails;
manage the plan in your account; or
email support@onyguard.com or call +1 (888) 530-7470.

You may pause, skip a shipment, change the interval, or cancel outright. We will not require you to speak to anyone, complete a retention call, or take any step that is harder than the step you took to subscribe.

Cancel at least 24 hours before your next billing date to avoid being charged for that cycle.

11.5 What happens when you cancel

Cancellation stops all future charges.
An order that has already been charged and processed cannot be cancelled, and will still be delivered. You may return it under our Return & Refund Policy.
Refunds on subscription orders are calculated on the discounted subscription price you actually paid.

11.6 Failed payments

If a renewal payment fails, we may retry it a limited number of times over a short period and will email you. If payment cannot be taken, the subscription is paused or cancelled and no product is dispatched.

Full detail is in our Cancellation Policy.

12. Shipping and delivery

Delivery estimates are estimates, not guarantees. Risk of loss passes to you on delivery. Full terms, including processing times, order modification windows and lost parcels, are in our Shipping Policy.

13. Returns, refunds and the 90-Day Money-Back Guarantee

We offer a 90-day money-back guarantee. The full conditions — including how opened product is treated, who pays return shipping, and how refunds are calculated — are set out in our Return & Refund Policy, which forms part of these Terms.

All returns require authorisation before you send anything back.

14. Medical disclaimer and regulatory status

Please read this section carefully.

These statements have not been evaluated by the Food and Drug Administration. Our products are not intended to diagnose, treat, cure or prevent any disease.
Our products are cosmetic and personal care products. They are not medicines, and nothing on the Site is medical advice.
Content on the Site — including articles, ingredient explanations, before-and-after images and customer stories — is for general information only and is not a substitute for advice from a qualified healthcare professional.
Fungal nail and foot conditions can resemble other conditions, some of which need medical treatment. If you have diabetes, poor circulation, a compromised immune system, an open wound, a spreading or painful infection, or if your condition does not improve, see a doctor or podiatrist. Do not delay medical care because of anything you read here.
Do not use our products if you are pregnant or breastfeeding, or if you are taking medication, without consulting a healthcare professional first.
Stop using the product and seek advice if you experience irritation, a rash, or an allergic reaction. Check the ingredient list before use if you have known allergies.
Keep out of reach of children. For external use only. Do not swallow.

15. Testimonials, reviews and results

Customer reviews and testimonials reflect the experience of individual people. Results vary and may not be typical.
Some reviewers received a free product or other compensation in exchange for an honest review. Where that is the case, it is disclosed.
Before-and-after images illustrate individual results and are not a promise of any outcome.
We do not edit reviews to change their meaning. We may remove reviews that are unlawful, abusive, off-topic, fake, or that make medical claims about our products.

16. Text message programme

By giving us your mobile telephone number and opting in, you consent to receive recurring automated marketing text messages from OnyGuard at that number, including messages sent using an automatic telephone dialing system. Consent is not a condition of any purchase.

Frequency: up to 15 messages per month. Frequency varies.
Cost: message and data rates may apply. We do not charge you; your carrier may.
To stop: reply STOP to any message. You may also opt out by emailing support@onyguard.com, by calling +1 (888) 530-7470, or by telling our support team in any reasonable way. We honour opt-outs promptly and in any event within 10 business days.
For help: reply HELP, or contact support@onyguard.com.
Carriers are not liable for delayed or undelivered messages.
You must own, or be authorised to use, the mobile number you provide, and you agree to tell us if you stop using it.

We do not sell, rent, lease, loan, trade or otherwise transfer for profit any telephone number or opt-in consent collected through the programme to any third party. No mobile information or opt-in consent is shared with third parties or affiliates for marketing or promotional purposes.

Full programme terms and how we handle the data: Section 12 of our Privacy Policy.

17. Email marketing

We send marketing emails only where you have opted in, or where you have bought from us and applicable law permits us to market similar products to you. Every marketing email contains a working unsubscribe link. You will continue to receive transactional messages about your orders and subscriptions.

18. Acceptable use

You agree not to:

use the Site in breach of any applicable law;
post or transmit anything unlawful, defamatory, harassing, obscene, misleading, or infringing;
upload malware or anything designed to interfere with the Site;
use bots, scrapers or other automated systems to access the Site without our written permission;
attempt to gain unauthorised access to any part of the Site, its servers, or another user's account;
interfere with the operation of the Site, including by placing fraudulent or abusive orders;
abuse promotions, discount codes, referral schemes or our money-back guarantee, including by creating multiple accounts; or
impersonate any person or misrepresent your affiliation with anyone.

We may suspend or terminate your access, cancel orders and refuse future business if you breach this section. We may remove unlawful content without prior notice.

19. User content

If you submit reviews, photographs, videos, comments or other material ("User Content"):

you confirm you own it or have the right to submit it, and that it does not infringe anyone's rights;
you grant us a non-exclusive, worldwide, royalty-free, perpetual licence to use, reproduce, adapt, publish and display it in connection with our business, including in marketing, without further payment or attribution;
you agree it may be published publicly and that we are not responsible for how others use it once published; and
we may remove or decline to publish any User Content at our discretion.

If you are paid or otherwise compensated to produce content for us, ownership and usage are governed by the separate agreement between us.

20. Intellectual property

All content on the Site — including the OnyGuard name and logo, text, graphics, images, video, page design, and software — is owned by Prolong Lab, UAB or its licensors and protected by intellectual property laws. You may view and print content for your own personal, non-commercial use. You may not otherwise copy, reproduce, modify, distribute, republish, frame, or use our content or trade marks without our prior written permission.

21. Third-party links and services

The Site may link to websites and services we do not control, including social media, payment providers and affiliate publishers. We are not responsible for their content, availability, terms or privacy practices, and linking does not imply endorsement. You use them at your own risk.

22. Prohibition on resale and redistribution

Our products are sold for personal use only. You may not resell, redistribute, or list our products on any marketplace, auction site, retail platform or other channel without our prior written authorisation.

We may, without notice: refuse, cancel or limit any order we reasonably believe is placed for resale; close the associated account; refuse to honour our guarantee on such orders; and take legal action. Products bought from unauthorised sellers are not covered by our guarantee, warranty or support, and we are not responsible for their condition, authenticity or safety.

23. Disclaimer of warranties

To the fullest extent permitted by law, and subject to Section 26, the Site and the products are provided "as is" and "as available".

We disclaim all warranties, express or implied, including implied warranties of merchantability, fitness for a particular purpose, title and non-infringement. We do not warrant that the Site will be uninterrupted, secure or error-free, that defects will be corrected, or that any particular result will be achieved by using our products.

Nothing in this section excludes liability that cannot lawfully be excluded, including liability for death or personal injury caused by our negligence, or for fraud.

24. Limitation of liability

To the fullest extent permitted by law, and subject to Section 26:

we are not liable for indirect, incidental, special, consequential, exemplary or punitive damages, or for loss of profits, revenue, data, goodwill or anticipated savings, arising out of or in connection with the Site, the products, or these Terms, whether in contract, tort (including negligence) or otherwise, even if we have been advised of the possibility; and
our total aggregate liability arising out of or in connection with any order is limited to the amount you paid for that order.

Some jurisdictions do not allow the exclusion or limitation of certain damages, so parts of this section may not apply to you.

25. Indemnity

You agree to indemnify and hold harmless Prolong Lab, UAB, its officers, directors, employees and agents from any claim, demand, loss, liability, cost or expense (including reasonable legal fees) arising from your breach of these Terms, your misuse of the Site, your User Content, or your violation of any law or third-party right.

26. Your rights as a consumer

Nothing in these Terms excludes, restricts or modifies any consumer guarantee, right or remedy that applies to you under law and cannot lawfully be excluded. Where any provision of these Terms conflicts with such a right, that right prevails.

Australia

Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and to compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if they fail to be of acceptable quality and the failure does not amount to a major failure. Our 90-day guarantee is offered in addition to these rights.

Canada

Nothing in these Terms limits your rights under applicable federal or provincial consumer protection legislation, including legislation governing automatic renewal contracts and distance sales. Residents of Quebec have additional rights under the Consumer Protection Act, and any provision of these Terms that is inconsistent with that Act does not apply to you.

United States

These Terms give you specific legal rights. You may have other rights that vary from state to state. Residents of states with automatic renewal laws, including California, have specific rights in relation to subscriptions, which are reflected in Section 11.

European Union and United Kingdom

Where we sell to you in the European Union or United Kingdom as a consumer, you have a statutory right to withdraw from the contract within 14 days of receiving the goods without giving a reason, in addition to our guarantee, and you retain the benefit of the mandatory consumer protection rules of the country in which you live.

27. Governing law

These Terms and any dispute arising from them are governed by the laws of the Republic of Lithuania, without regard to conflict of law rules — except that:

if you are a consumer resident in the United States, Canada or Australia, this choice of law does not deprive you of the protection of the mandatory consumer protection laws of your country, state or province, which continue to apply; and
the arbitration agreement in Section 28 is governed by the Federal Arbitration Act of the United States where it applies to you.

The United Nations Convention on Contracts for the International Sale of Goods does not apply.

28. Dispute resolution

28.1 Talk to us first

Before starting any formal proceedings, please contact us at support@onyguard.com with a description of the dispute and the resolution you want. We will try to resolve it informally within 45 days. Most issues are resolved this way.

28.2 Binding arbitration — customers in the United States

This section applies only if you are resident in the United States. It affects your legal rights. Please read it carefully.

If we cannot resolve a dispute informally, you and OnyGuard agree that any dispute, claim or controversy arising out of or relating to these Terms, the Site or the products will be resolved by binding individual arbitration, and not in court, except as set out below. This agreement is governed by the Federal Arbitration Act.

Arbitration will be administered by the American Arbitration Association under its Consumer Arbitration Rules, available at adr.org.
The arbitration will take place in the county where you live, or by telephone or video, or on the documents alone, at your choice.
The arbitrator may award the same individual relief a court could, and the award is final and binding.
We will pay the arbitration filing, administration and arbitrator fees for any claim of US $10,000 or less that you file, unless the arbitrator finds the claim frivolous.

Class action waiver. You and OnyGuard agree that each may bring claims against the other only in an individual capacity, and not as a plaintiff or class member in any class, collective, consolidated or representative proceeding. The arbitrator may not consolidate claims or preside over any form of representative proceeding. If this waiver is found unenforceable as to a particular claim, that claim — and only that claim — must proceed in court.

Exceptions. Either of us may bring an individual claim in small claims court, and either of us may seek injunctive relief in court to protect intellectual property rights.

Your right to opt out. You may opt out of this arbitration agreement by emailing support@onyguard.com with the subject line "Arbitration opt-out" within 30 days of your first purchase, stating your name, address and order number. Opting out does not affect any other part of these Terms, and we will not treat you any differently for doing so.

28.3 Customers outside the United States

If you are resident outside the United States, disputes are subject to the exclusive jurisdiction of the courts of the Republic of Lithuania, except that if you are a consumer you may also bring proceedings in the courts of the country where you live, and nothing prevents you from relying on the mandatory consumer protection law of that country.

Consumers resident in the European Union may also use the European Commission's Online Dispute Resolution platform.

29. Force majeure

We are not liable for any failure or delay caused by events outside our reasonable control, including natural disasters, fire, flood, epidemic, war, civil unrest, strikes, carrier or supplier failure, customs delays, government action, power failure, and failures of the internet or telecommunications networks.

30. General

Severability. If any provision of these Terms is held unenforceable, the rest remains in full force and the unenforceable provision is modified to the minimum extent necessary.
No waiver. Our failure to enforce any provision is not a waiver of it.
Assignment. You may not assign these Terms. We may assign them to an affiliate or in connection with a merger, acquisition or sale of assets.
No third-party beneficiaries. These Terms are between you and us only.
Entire agreement. These Terms, together with the Privacy Policy, Return & Refund Policy, Cancellation Policy and Shipping Policy, form the entire agreement between us regarding the Site and supersede any prior understanding.
Headings. Section headings are for convenience only and do not affect interpretation.
Survival. Sections 14, 19, 20, 22, 23, 24, 25, 27, 28 and 30 survive termination.
Language. These Terms are written in English. Any translation is provided for convenience, and the English version governs.

31. Contact

Prolong Lab, UAB (trading as OnyGuard) Dominikonų g. 11, LT-01131 Vilnius, Lithuania Email: support@onyguard.com Telephone (toll-free, United States): +1 (888) 530-7470

These statements have not been evaluated by the Food and Drug Administration. Our products are not intended to diagnose, treat, cure or prevent any disease.