BioLongevity Labs coupon code PCT15 gives a 15% discount on the cart subtotal at checkout, removed as a discount line rather than paid back later as credit. Because the code is applied to whatever is in the cart at that moment, the sensible order is to settle product variants and quantities first and only then enter the code. The approach below treats quantity as the variable to fix before the coupon step.

The catalog lists more than 150 research-grade peptides, and many of them come as lyophilised vials, capsules or topical preparations. Many products also have variants such as different vial sizes or quantities. Each variant is a separate line in the cart, so a change to size or count changes the subtotal that the 15% is calculated on. The knowledge supplied does not say whether the discount line updates correctly if you change a variant after the code is already applied, so the safest habit is to finalise the cart first and check the discount line afterwards.

The discount is taken from the cart subtotal. If your order is built from several variants, add the line totals together and confirm the subtotal you expect before you open the coupon field. Once PCT15 is applied, a discount line should appear between subtotal and total showing 15% removed. If the figure on that line does not match 15% of the subtotal you wrote down, stop and check the cart before paying.

Free shipping applies to orders over $400, calculated on the grand total before tax and shipping. The knowledge states that applying the code lowers the subtotal measured against that threshold. This matters when a quantity change is close to the line. A basket that clears $400 before the code may not clear it after the 15% is taken off, and the reverse can also happen when quantities are adjusted. Work the numbers with the discounted subtotal in mind, not the list price.

No code applies to out-of-stock items showing a waitlist button, so a quantity you want that is on a waitlist will not be discounted. Some stores also exclude already-reduced items from coupon eligibility. The knowledge does not confirm whether this store does so, nor whether specific already-discounted products accept the code. Two checks are suggested: compare the sale price with the discounted price on any reduced item, and confirm that the discount line covers each line you intend to buy.

The knowledge describes the coupon field as case-insensitive but says it rejects stray characters, so type the code exactly as written, with no spaces. Products are sold for in vitro research and development use only, and are not intended to diagnose, treat, cure or prevent any disease. The code changes the price of the order and nothing about how the products may be used.

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