The hardest part of training

STLN Performance is available to adults 18 and older who are in generally good health. You'll complete a short health questionnaire and your eligibility will be assessed based on your health history, current supplements, and individual factors.

The online assessment takes about 10 minutes. Once submitted, your information is reviewed and you'll receive a status update typically within a few business hours.

BPC-157 is a peptide fragment known for its targeted tissue repair properties — particularly effective for joint, tendon, ligament, and muscle recovery. TB-500 is a synthetic version of Thymosin Beta-4, a naturally occurring peptide that promotes systemic muscle repair, improves flexibility and mobility, and accelerates wound healing throughout the body. The Wolverine Stack combines both for complete coverage — targeted and systemic healing in one protocol.

BPC-157 is used to support accelerated healing of soft tissue injuries including tendons, ligaments, and muscle tears. It is also known to reduce inflammation and support recovery from surgical procedures or acute trauma. Many athletes use it to address nagging injuries and recover faster between hard training cycles.

TB-500 is a synthetic peptide derived from Thymosin Beta-4, a protein involved in cell building and repair. Where BPC-157 works well for localized injury recovery — joints, tendons, and specific tissue damage — TB-500 operates more systemically. It promotes whole-body muscle repair, improves flexibility and range of motion, supports angiogenesis (new blood vessel formation), and accelerates healing across multiple tissue types simultaneously. The two peptides complement each other well, which is why many athletes use the Wolverine Stack.

BPC-157 and TB-500 are not FDA-approved. They are research peptides used for performance and recovery support. They are not over-the-counter supplements.

The intake questionnaire helps determine the most appropriate protocol based on your goals, health history, and current status. If you have a specific localized injury, BPC-157 is often the right starting point. If you're dealing with systemic recovery, mobility, or whole-body healing needs, TB-500 or the Wolverine Stack may be more appropriate.

Both BPC-157 and TB-500 are typically administered via subcutaneous injection — a small needle just under the skin, similar to insulin administration. Detailed injection instructions and supplies are included with your order.

Most people with no prior injection experience pick it up quickly. Subcutaneous injections use very small needles and are minimally uncomfortable. Your order includes step-by-step instructions, and our support team is available to help.

Results vary based on the nature of the injury, your overall health, and the protocol selected. Many users report noticeable improvement in recovery and reduced soreness within 2–4 weeks. For chronic injuries or significant tissue damage, a full protocol cycle is typically needed before peak results are observed.

Do not self-adjust doses. Contact our support team if you have any dosing questions.

BPC-157 and TB-500 are generally well tolerated. The most commonly reported side effects include mild injection site reactions (redness, swelling) and occasional fatigue or lightheadedness in the first few days. Serious adverse events are rare.

Yes. Both peptides are intended to support active individuals — they work alongside your training to accelerate recovery so you can maintain or increase your training volume. Always disclose your full supplement stack when completing your intake.

Yes — injury recovery is one of the primary use cases for both BPC-157 and TB-500. BPC-157 is particularly effective for localized injuries (tendons, ligaments, joints), while TB-500 is well suited for systemic or widespread tissue repair.

You can reach the STLN Performance support team at support@americanstln.com. We're here to help with any questions about your protocol, order, or account.

Orders are shipped discreetly in unmarked packaging directly to your address. Shipments are temperature-controlled where required. Most orders arrive within 3–5 business days.

Yes. You can cancel or pause your subscription at any time through your portal or by contacting our support team. There are no long-term contracts or cancellation fees.

Insurance does not typically cover peptide protocols. All pricing is straightforward and disclosed upfront — no hidden fees or surprise charges.