FAQ & Guides

Quality Standards

Zoiful prioritizes quality, transparency, and compliance in our sourcing and testing processes. While peptides do not fall under USP monograph standards for pharmaceuticals, our testing and quality control align with industry best practices, including USP 797 and 1079 where applicable.

  • Each batch undergoes independent third-party testing, including both purity and quantity verification, and is issued a Certificate of Analysis (COA)
  • Batch numbers are assigned to ensure full traceability across COAs and vial labeling
  • Multiple vials are tested from each batch to confirm consistency
  • Testing is conducted by an independent laboratory, separate from manufacturing, following cGMP (Current Good Manufacturing Practices) guidelines for quality assurance

At Zoiful, quality is never a question — it’s a promise. Our products are tested by independent labs that follow cGMP and ICH guidelines. While we partner with multiple labs based on specific needs, Chromate serves as our primary testing provider.

🟢 Potency

Every batch is tested to confirm it contains the right amount of active ingredient — within 10% of the intended dose — so you get exactly what you expect, every time.

🟢 Sterility

This test is to make sure our products are free of bacteria or harmful contaminants, following strict safety standards used in pharmacies nationwide (USP <797>).

🟢 Endotoxins

This test, alongside sterility testing, ensures our products are free from harmful bacterial toxins. Our peptides are tested for bacterial endotoxins and complies with USP <85> requirements.

🟢 pH Balance

This test confirms that our bacteriostatic solution contains 0.9% benzyl alcohol and maintains a sterile formulation, minimizing the risk of irritation or tissue damage.

Zoiful prioritizes quality, transparency, and compliance in our sourcing and testing processes. While peptides do not fall under USP monograph standards for pharmaceuticals, our testing and quality control align with industry best practices, including USP 797 and 1079 where applicable.

  • Each batch undergoes independent third-party testing, including both purity and quantity verification, and is issued a Certificate of Analysis (COA)
  • Batch numbers are assigned to ensure full traceability across COAs and vial labeling
  • Multiple vials are tested from each batch to confirm consistency
  • Testing is conducted by an independent laboratory, separate from manufacturing, following cGMP (Current Good Manufacturing Practices) guidelines for quality assurance

At Zoiful, quality is never a question — it’s a promise. Our products are tested by independent labs that follow cGMP and ICH guidelines. While we partner with multiple labs based on specific needs, Chromate serves as our primary testing provider.

🟢 Potency

Every batch is tested to confirm it contains the right amount of active ingredient — within 10% of the intended dose — so you get exactly what you expect, every time.

🟢 Sterility

This test is to make sure our products are free of bacteria or harmful contaminants, following strict safety standards used in pharmacies nationwide (USP <797>).

🟢 Endotoxins

This test, alongside sterility testing, ensures our products are free from harmful bacterial toxins. Our peptides are tested for bacterial endotoxins and complies with USP <85> requirements.

🟢 pH Balance

This test confirms that our bacteriostatic solution contains 0.9% benzyl alcohol and maintains a sterile formulation, minimizing the risk of irritation or tissue damage.

Returns & Refunds

We do not offer refunds for purchases made on our website. All sales are final, and we do not accept returns for refunds or store credit. If a refund is approved, a 10% restocking fee will be applied.

Please see alternative policy information for lost or damaged items.

Due to the nature of our products, we cannot accept returns. However, if you receive a damaged item, we may authorize a replacement.

To initiate the replacement process, please email support@zoifulwellness.com with the following details:

  • Order Number
  • Lot Number
  • Image of the Damaged Item

Requests must be submitted within 3 days of receiving your order. Replacement items are subject to review and availability. If a replacement cannot be authorized, a credit of equal value may be applied to your account.

In the rare event that your order is lost during transit, please contact our customer support team as soon as possible to report the issue. We will work with our shipping carrier to locate the package or arrange for a replacement to be sent to you.

Shipping costs will be handled by our company or the courier, and you will not incur another shipping charge for a lost item.

We do not accept returns or exchanges for items that have been used, altered, or damaged due to misuse or improper handling.

Additionally, certain products may be ineligible for return or exchange due to hygiene or safety reasons, such as personal care items, perishable goods, or customized products. Please review the product description and specifications carefully before making your purchase.

If you have any questions or concerns regarding our refund and return policy, please contact support@zoifulwellness.com for assistance. We are committed to ensuring that you have a positive shopping experience with us.

Shipping & Delivery

We strive to fulfill orders placed before 12pm PT Monday-Friday on the same day. All orders are typically processed within 1 business day (excluding weekends and holidays) after payment confirmation. During peak seasons or promotional periods, processing times may be slightly longer.

The estimated delivery time varies depending on your location, selected shipping method, and any unforeseen circumstances such as weather delays.

Once your order has been shipped, you will receive a shipping confirmation email containing tracking information to monitor the progress of your delivery.

Due to supply chain challenges, shipping times could be longer than usual.

Shipping rates are calculated based on factors such as destination, package weight, and selected shipping method. You can view the shipping rates for your order during the checkout process before making a purchase.

We may offer free shipping promotions for qualifying orders. Please refer to our website or promotional emails for more information about current free shipping offers and eligibility criteria.

Certain items may be subject to shipping restrictions or regulations imposed by local authorities or carriers. We comply with all applicable shipping restrictions and reserve the right to cancel orders containing prohibited items.

Additionally, we do not ship to P.O. boxes or military addresses at this time. Please provide a valid residential or commercial address for delivery when placing your order.

We may periodically update our shipping policy to reflect changes in shipping methods, rates, or procedures. Any updates or revisions to our shipping policy will be promptly communicated on our website and may require your review and acceptance before proceeding with future orders.

We offer a range of shipping options to accommodate your needs, including standard shipping, priority shipping, and express shipping. The available shipping methods may vary depending on your location and the items in your order.

Our primary shipping couriers are USPS and UPS. We select the most suitable courier for your order based on factors such as destination, package size, and delivery speed.

Once your order has been shipped, you can track its progress using the tracking number provided in your shipping confirmation email or by logging in to your account on our website.

If you encounter any issues with tracking your order or have questions about its delivery status, please contact our customer support team for assistance.

Payments & Security

All direct payment gateways adhere to the standards set by PCI-DSS as managed by the PCI Security Standards Council, which is a joint effort of brands like Visa, MasterCard, American Express, and Discover.

We accept a variety of payment methods to provide flexibility and convenience for our customers. These include:

  • Credit or Debit Cards: We accept major credit and debit cards, including Visa, Mastercard, American Express, and Discover.
  • Online Banking: For customers who prefer to pay directly from their bank account, we offer online banking options.

We may impose a credit card transaction fee, not to exceed 5%, for bulk orders. Otherwise, we do not impose any additional fees for using specific payment methods. However, depending on your chosen payment provider or financial institution, they may apply their own transaction fees or currency conversion charges.

For your security and privacy, we do not store or have the ability to store payment information. All transactions are processed securely through our payment providers, and we do not retain credit card or payment details on our systems. If you have any concerns about your payment, please contact support@zoifulwellness.com

If your payment is declined, please ensure that you have entered the correct payment information and that your payment method is valid and has sufficient funds available. If the issue persists, we recommend contacting your payment provider or financial institution for further assistance.

Upon successful payment, you will receive a confirmation email or order receipt confirming the details of your transaction. Additionally, you can log in to your account to view your order history and payment status.

At this time, we do not offer installment payment options. However, we continuously review our payment methods to best meet the needs of our customers and may consider introducing installment payment options in the future.

We regret to inform you that we do not accept health insurance or CareCredit as payment methods at this time. If you have questions regarding payment options for healthcare-related services, we recommend speaking with your healthcare provider or insurance company for assistance.

Questions? We have answers.