Sermorelin Injection
A growth hormone-releasing peptide that supports deeper sleep, faster recovery and lean muscle by working with your body's own rhythm.
Injection
from $179/mo
Injected under the skin · 5 days a week
Research peptideTissue repair
Pentadeca-Arginate (PDA)
A research peptide related to BPC-157, studied for tissue repair and healing, used off-label to support recovery from injury.
- Chemically related to BPC-157, the body-protection peptide
- Preclinical evidence for tendon, muscle and wound healing
- Subcutaneous injection, dosed by your physician
- Monthly$299/mo
- Every 3 months$717 billed up front$239/mo
- Every 6 monthsBest value$1,254 billed up front$209/mo
- Free, discreet shipping
- Licensed U.S. pharmacy
- Board-certified physicians
Disclaimer: Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Products are compounded by a licensed pharmacy. The FDA has not reviewed or approved compounded products for any use for safety, efficacy, or quality. Compounded medications are not FDA-approved brand-name products.
- How
- Injected under the skin
- How often
- 5 days a week
- Each shipment
- 1 vial
- Strength
- 3 mg/mL
What is Pentadeca-Arginate?
(PDA; a BPC-157 analog)
Pentadeca-Arginate is a synthetic peptide designed as a stable analog of BPC-157. Like BPC-157, it is studied for accelerating tissue repair through blood-vessel growth and cell signaling. It is prescribed off-label based on preclinical research and clinical experience.
What's in it
- Pentadeca ArginateRelative of BPC-157: tissue repair
Analog
of BPC-157, designed for improved stability
Most evidence is preclinical. Human evidence is very limited. Prescribed off-label at your physician's discretion.
Is it right for you?
Who it's for
People interested in BPC-157 who want its newer relative.
What sets it apart
The same 15-amino-acid chain as BPC-157 with arginine in place of the acetate salt. It has less research behind it, not more.
Worth knowing before you start
Choose one or the other. Taking it together with BPC-157 has no logic.
What to expect
Slower feedback
early-stage therapies take time and close monitoring
Individual response
outcomes vary widely because evidence is limited
Physician partnership
your role is to communicate closely at every check-in
Informed choice
you understand the evidence gap before starting
How research peptides work
Day 1
A US-licensed physician reviews your goal, health history and reasons to try this early-stage peptide. You discuss the evidence and the unknowns together.
1Week 1
A small subcutaneous injection, usually in the abdomen or near the site you're treating. Most people find the routine comfortable within days.
2Week 2–4
Signaling and recovery processes begin. Many report improved energy or easier movement, depending on the peptide.
3Month 2+
Your physician checks in, adjusts dose if needed, and follows relevant labs (IGF-1, immune markers, etc.). Tell them everything you notice.
4
Individual results vary. Benefits reflect what Zepym Health members commonly report to their physician at check-ins; they are not the results of a clinical trial.
How you use it
This is the starting dose the pharmacy prints on the label. Your physician sets yours and adjusts it with you.
- How
- Injected under the skin
- Where
- near the injury site
- Dose
- 20 units (0.6 mg)
- How often
- 5 days a week
- Each shipment
- 1 vial
- Pharmacy label
- Inject 20 units (0.6 mg) subcutaneously near the injury site once daily 5 days per week for 4 weeks. Discard any remaining medication.
A sample week
- M
- T
- W
- T
- F
- S
- S
5 days a week
The science of research peptides
Pentadeca arginate is a stabilized salt form of the BPC-157 sequence. The animal studies on tendon and muscle healing were done with BPC-157; pentadeca arginate itself has no published studies yet.
Direct human trials are lacking. Your physician uses it based on its structural relationship to BPC-157 and clinical experience, not approved data.
Learn moreImportant safety information and common side effects
Research peptides are prescribed off-label and carry more uncertainty than established therapies. Common, mild effects include redness, itching or a bump at the injection site, headache, or flushing in the first days. Because these peptides support cell growth or immune signaling, they are not prescribed with an active cancer, a cancer under evaluation, or during pregnancy or breastfeeding. Some (IGF-1) require careful glucose monitoring. Tell your physician about every medication you take, every supplement, and your complete health history, including any autoimmune conditions. Stop and seek care for hives, swelling of the face or lips, or trouble breathing.
Every plan includes
- Personalized, physician-guided plan
- Monthly, 3-month and 6-month plans
- Dispensed by a US-licensed compounding pharmacy
- Unlimited protocol adjustments and messaging
- Ongoing support and check-ins
- Pause or cancel anytime
- Reviewed by our in-house physicians
How it works
1.Connect with a physician
Answer a few questions online and a US-licensed physician reviews your health, history and goals to make sure treatment is right for you. 100% online. No in-person visit required.
2.Get your discreet shipment
If approved, your treatment is compounded by a US-licensed, LegitScript-certified pharmacy, inspected for quality, and shipped discreetly to your door.
3.Receive continuous support
Start with one goal, then keep building over time. Unlimited physician messaging, easy refills and dose adjustments, all from the Zepym Health app.
Pentadeca-Arginate educational content reviewed by our physician
Scott Nass, MDDoctor of Medicine, board-certified in Family Medicine
Charles R. Drew University and David Geffen School of Medicine at UCLA. Family Medicine residency at Ventura County Medical Center.
Frequently asked questions
How do I use Pentadeca Arginate?
Injected under the skin, 5 days a week. The starting prescription is 20 units (0.6 mg) each time. Your physician sets your own dose and it is printed on your label.
Where do I inject it?
Near the injury site. Change the exact spot each time.
How much arrives in each shipment?
1 vial at the starting strength, shipped to your door from a licensed US pharmacy.
How is PDA different from BPC-157?
It is chemically designed to be a more stable version of BPC-157. Preclinically they show similar effects; human evidence for both is early. Your physician decides whether BPC-157 or PDA fits your situation better.
Why are these off-label?
Off-label means not FDA-approved for these specific uses, but prescribed by physicians based on preclinical evidence and clinical experience. It is common in medical practice; your physician explains the evidence and the gaps.
How often do I take it?
Usually a small subcutaneous injection once daily or a few times a week, depending on the peptide. Your physician sets the schedule and adjusts it as needed. The kit includes everything.
What is the evidence really like?
Honest answer: early. Preclinical and animal data are promising; human data are limited or absent. Your physician explains this plainly and monitors you closely. If you prefer established therapies, tell them.
Research peptides require partnership.
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The above statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Individual results vary.
Sources
- 1
Mechanisms of IGF-1-Mediated Regulation of Skeletal Muscle Hypertrophy and Atrophy.
Cells, 2020 - 2
Unique features of human cathelicidin LL-37.
Biofactors, 2015 - 3
Regeneration or Risk? A Narrative Review of BPC-157 for Musculoskeletal Healing.
Curr Rev Musculoskelet Med, 2025 - 4
Metabolic effects of a growth hormone-releasing factor (tesamorelin) in patients with HIV.
N Engl J Med, 2007 - 5
Ipamorelin, the first selective growth hormone secretagogue.
Eur J Endocrinol, 1998 - 6
Thymosin alpha 1: A comprehensive review of the literature.
World J Virol, 2020
Pentadeca-Arginate (PDA)from $209/mo