Refund policy
Effective Date: November 9, 2026
Last Updated: November 9, 2026
This Refund Policy explains how subscriptions, cancellations, refunds and returns work for purchases from Zelenko Labs LLC ("Zelenko Labs," "we," "us"). It summarizes Sections 4 and 5 of our Terms of Service. If the two ever differ, the Terms of Service control, except for the statutory rights described in the EU and UK section below, which always apply.
1. Subscriptions
- Subscriptions. Some supplement products are offered as recurring subscriptions. The price, billing frequency and next renewal date are shown before you subscribe and in your account at all times. By subscribing you authorize us to charge your payment method at that price and frequency until you cancel. You can pause or skip a renewal and update your shipping and payment details from the Subscriptions page of your account. Kits are not sold on a subscription basis and require a new clinical review for each order.
- Introductory offers. From time to time we offer a reduced price on the first order of a supplement subscription. Introductory offers do not apply to Kits. The introductory price applies to the first order only. Unless you cancel, your subscription then renews at the regular subscription price and frequency shown with the offer and at checkout, plus any shipping and handling stated there. You consent to the recurring charges at checkout before your order is placed. We send you a reminder, with the renewal amount, date and how to cancel, before the first charge at the regular price.
- Cancelling a subscription. You can cancel at any time, with immediate effect, from the Subscriptions page of your account, or by contacting Customer Support. A cancellation counts from the moment you submit it in your account or your message reaches us, not from when it is processed. If your cancellation is submitted before the renewal charge is processed, no further charge is made. If a renewal has already been charged when your cancellation is received, that order will ship and is subject to the supplement return terms in Section 2; your subscription ends after that order. We send a reminder email before each renewal.
- Price changes. If we change the price of your subscription, we will notify you in advance, and you may cancel before the new price takes effect.
2. Supplements
For health and safety reasons, supplement sales are final. If a supplement order arrives damaged, is missing items, contains the wrong items, or does not arrive, contact Customer Support within 30 days and we will replace or refund the affected items.
Customers in the EU and UK have a statutory 14-day right of withdrawal for unopened products; see Section 6.
3. Kits
The price of a Kit is a single bundled price that includes the clinician's review of your intake and related services. The clinical review is performed whether or not a prescription is issued.
- Declined prescription. If the clinician determines that no prescription is appropriate, no prescription medication will ship. Your order is automatically reviewed for a partial refund. The refund amount is based on applicable state requirements and the circumstances of the order, and may vary because the bundled purchase price includes clinical review and other services performed whether or not a prescription is issued. Refunds are issued to the original payment method.
- Partial prescription. If the clinician prescribes some but not all items in the kit, the kit ships with the prescribed items. You may contact Customer Support to request a refund for items not prescribed; such requests are reviewed individually.
Returns of medication
Once a prescription has been dispensed by the pharmacy, the medication cannot be returned, exchanged or refunded. This is a pharmacy law requirement and applies whether or not the package has been opened.
Lost, damaged or incorrectly filled Kit orders
The no-return rule does not apply where something goes wrong before your medication reaches you in good condition. If your Kit order does not arrive, arrives damaged, or does not match what the clinician prescribed, contact Customer Support within 30 days of the expected delivery date. We will work with the Pharmacy to have the affected items re-dispensed and reshipped at no charge, or, where a replacement is not possible, refund the affected items.
4. Refund method, shipping address errors and chargebacks
- Refund method. Refunds are issued to your original payment method. Your card issuer may take additional time to post the credit.
- Shipping address errors. You are responsible for entering a correct shipping address. Orders shipped to an address you entered incorrectly are not refundable, and we are not responsible for packages lost or delayed as a result.
- Chargebacks. If you have a problem with an order, contact us first. Payment disputes raised without contacting us may result in suspension of your account.
5. International orders
Kits and telehealth consultations are available only to customers in the United States. If you order supplements from outside the United States, customs duties, taxes and clearance delays are your responsibility, and we are not responsible for shipments seized, delayed or returned by customs.
6. EU and UK customers: 14-day right of withdrawal
If you are a consumer residing in the European Union or the United Kingdom, you have the legal right to withdraw from your purchase within 14 days of receiving your order, without giving any reason. In the UK this right comes from the Consumer Contracts (Information, Cancellation and Additional Charges) Regulations 2013.
Unopened products only. The right of withdrawal does not apply to sealed goods that are not suitable for return for health protection or hygiene reasons once they have been unsealed after delivery. Our supplements fall under this exception, so the right of withdrawal applies to unopened products with their seals intact.
How to withdraw. Use our Withdrawal Form or contact us using the details below, within 14 days of receiving your order. Returned items must be sent back within 14 days of notifying us of your decision to withdraw.
Your refund. Upon a valid withdrawal, we will refund all payments received for the order, including the original standard delivery charges, within the timeframe required by applicable law. You may be responsible for the direct cost of returning the goods, which will not exceed the actual return shipping cost. No restocking or handling fees are charged for returns made under the statutory right of withdrawal.
7. Contact us
Zelenko Labs LLC
9045 La Fontana Blvd, Suite 105
Boca Raton, FL 33434
Email: support@zstacklife.com
Phone: 1-800-ZELENKO (1-800-935-3656)
