All active QSC discount codes and promotions in one place. Codes are verified and applied at checkout on qsc-usa.com. Prices are listed in USD and payment is made in cryptocurrency (BTC or USDT ERC-20) through Blockonomics.
Free domestic shipping from the nearest QSC warehouse — USA, EU, UK, Canada, or Australia — on every order, with no minimum spend required.
No code needed — applied automatically at checkout
Conditions: Applies to all QSC peptide orders with no minimum. Ships from the nearest domestic warehouse where inventory is available. International orders (shipped from Qingdao, China) are also covered at no charge.
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20% Off $5,000+
20% Off Orders of $5,000 or More
Save 20% on your entire order when your cart reaches $5,000 USD or more. Ideal for laboratory bulk procurement, distributor restock orders, or multi-stack research kits.
QSC20OFF Copy
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Conditions: Minimum order $5,000 USD. Enter code QSC20OFF in the WooCommerce coupon field on the cart page. Discount applies to product subtotal. Cannot be combined with other promotional codes. Payment in BTC or USDT ERC-20 via Blockonomics.
How to Apply a Coupon Code
Step-by-step: using a QSC coupon code at checkout
1. Browse products at qsc-usa.com and add items to your cart.
2. Click View Cart or proceed to Checkout.
3. On the cart page, find the “Coupon code” field beneath your order items. Enter your code exactly as shown (e.g. QSC20OFF) and click “Apply coupon”. The discount line appears immediately in your cart totals.
4. Continue to checkout. Fill in billing details, then select Bitcoin (BTC) or USDT (ERC-20) as your payment method — both processed through Blockonomics.
5. Click “Place order.” You are redirected to the Blockonomics payment page showing the discounted total converted to cryptocurrency at the live rate. Send the exact amount to the address shown — order confirmed once detected on-chain.
Where exactly is the coupon field in WooCommerce?
The coupon field appears on the Cart page (qsc-usa.com/cart) beneath your order items, labeled “Coupon code.” On the Checkout page it may appear as a collapsible link near the top: “Have a coupon? Click here to enter your code.” Click to expand, enter the code, click Apply — before proceeding to payment.
Does the free shipping offer need a code?
No. Free shipping is a WooCommerce site-wide shipping rule and is applied automatically to every order. You will see $0.00 next to the shipping line at checkout regardless of order size or destination.
Coupon FAQ
Can I combine multiple coupon codes?
No. WooCommerce applies one coupon per order. Free shipping is not a coupon — it is a site-wide rule that stacks automatically alongside any discount code.
Does QSC20OFF apply to all products?
Yes. The 20% discount applies to the product subtotal across the entire QSC catalog provided the cart total meets $5,000 USD. This includes individual peptide vials, bulk quantities, and curated stacks such as the Clavicular Ascension Stack, Venus Protocol, and Midas Longevity Protocol.
Do coupon codes work with Bitcoin and USDT payments?
Yes. Coupon codes work with both BTC and USDT (ERC-20) via Blockonomics. The discount is applied to the USD subtotal in WooCommerce before the order is created. Blockonomics then converts the discounted USD total to the equivalent crypto amount at the live rate.
How do I know my coupon applied correctly?
After clicking “Apply coupon,” WooCommerce shows a green confirmation and a Coupon: QSC20OFF discount line in your order totals. If rejected, WooCommerce displays an error. Common causes: cart is below $5,000, or the code has a typo or extra space.
My Blockonomics page shows the full price — why?
The coupon must be applied before clicking “Place order.” Once the WooCommerce order is created and Blockonomics generates a payment address, the total is fixed. If the discount is missing on the Blockonomics page, do not complete payment — contact [email protected] first.
Can I apply a coupon to an existing order?
No. Coupons must be applied before clicking “Place order.” Once a Blockonomics payment address is generated, the order total is fixed and cannot be modified.
Where can I find the latest QSC promo codes?
This page is the authoritative source for all active QSC promotions. Codes are verified and current. Third-party coupon sites may list expired or fabricated codes — always verify here first. QSC occasionally announces new promotions on MESO-Rx / Thinksteroids and its research community channels.
Research Use Only: All products sold on qsc-usa.com are intended strictly for laboratory research purposes only. They are not approved for human consumption, veterinary use, or any other application. Researchers are responsible for understanding and complying with local regulations in their jurisdiction.
