Contact information
Last updated: 18 September 2026
We would rather hear from you than have you guess. If something is wrong with an order, tell us first — we resolve almost everything within one business day, which is faster than a bank dispute.
Get in touch
support@onyguard.com
This is the fastest way to reach us and it is monitored every business day. We usually reply within 1 business day.
Please include your order number. If you do not have it, give us the email address and postal code you used at checkout and we will find the order.
Telephone
+1 (888) 530-7470 — toll-free within the United States
Monday to Friday, 10:00 – 15:00 Eastern Time
Outside those hours, leave a voicemail or send an email and we will come back to you on the next business day.
By contacting us by telephone you consent to receive telephone calls and messages from OnyGuard in reply. You may withdraw that consent at any time — by email, by text message, or verbally during a call.
Post
Prolong Lab, UAB Dominikonų g. 11 LT-01131 Vilnius Lithuania
Please note this is our registered office, not a returns address. Do not send returns here — they cannot be processed and cannot be refunded. Request a return authorisation first and we will give you the correct address for your region. See our Return & Refund Policy.
What to contact us about, and where
| Your question | Where to go |
|---|---|
| Where is my order? | Check your tracking link first, then Shipping Policy |
| I want to return something | Return & Refund Policy — request authorisation before sending anything |
| Cancel, pause or skip a subscription | Manage Subscription link in any OnyGuard email, or Cancellation Policy |
| Change or cancel an order just placed | Email us immediately — there is a short window, see Shipping Policy |
| A charge I do not recognise | Email support@onyguard.com before contacting your bank |
| Privacy request, or a copy of my data | support@onyguard.com — see Privacy Policy |
| Stop marketing emails | Unsubscribe link at the foot of any marketing email |
| Stop text messages | Reply STOP to any message |
| Wholesale, press or partnerships | support@onyguard.com, marked for the relevant team |
Company details
| Trade name | OnyGuard |
| Registered company name | Prolong Lab, UAB |
| Registered address | Dominikonų g. 11, LT-01131 Vilnius, Lithuania |
| Company registration number | 307116099 |
| Value Added Tax identification number | LT100017808315 |
| support@onyguard.com | |
| Telephone | +1 (888) 530-7470 |
A note on medical questions
Our support team can help with orders, deliveries, subscriptions, refunds and how to use our products. We cannot give medical advice, diagnose a condition, or tell you whether our products are suitable for a particular health problem.
If your condition is painful, spreading or not improving, or if you have diabetes, poor circulation or a weakened immune system, please speak to a doctor or podiatrist. See the Medical Disclaimer in our Terms of Service.
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.