TL;DR: Peptide therapy is one of the fastest-growing areas of longevity and performance medicine — but the market is fragmented and quality varies enormously. Our top clinical picks are Tailor Made Health and Defy Medical for physician-supervised protocols.
Note: Peptide therapy occupies a gray area in US regulation. Many peptides are compounded by licensed pharmacies and prescribed by physicians off-label. Always consult a physician before using peptides.
→ Compare longevity testing services
Comparison Table
| Clinic / Supplier | Context | Peptides Offered | Visit Site |
|---|---|---|---|
| Tailor Made Health | Clinical / Rx | CJC-1295, BPC-157, TB-500, Ipamorelin | Visit Site → |
| Defy Medical | Clinical / Rx | Full panel, physician-supervised | Check Price → |
| Maximus | Clinical (GH peptides) | Ipamorelin/CJC-1295 | Visit Site → |
| Peptide Sciences | Research supply | Extensive catalog | Visit Site → |
What Is Peptide Therapy?
Peptides are short chains of amino acids that act as biological signaling molecules. In therapeutic contexts, specific peptides are used to stimulate growth hormone release (Ipamorelin, CJC-1295, Sermorelin), accelerate tissue healing (BPC-157, TB-500), support cognitive function (Semax, Selank), improve metabolic function, and modulate immunity (Thymosin Alpha-1).
How We Evaluated These Options
Using our standard methodology: physician oversight, pharmacy sourcing (licensed 503A/503B vs. research supply), protocol transparency, pricing transparency, and community reputation.
Quick Decision Summary
- Best overall clinical provider: Tailor Made Health
- Best for complex protocols: Defy Medical
- Best for GH peptides: Maximus
Our Top Picks
1. Tailor Made Health — Best Clinical Peptide Provider
Why it ranks #1: The broadest peptide menu available online with individualized protocol design by a clinical team — the most comprehensive peptide provider tested.
A telehealth platform specializing in performance and longevity medicine, including peptide protocols. Licensed physicians prescribe peptides from licensed compounding pharmacies — the most legitimate clinical route available. Protocols include CJC-1295/Ipamorelin, BPC-157, Thymosin Alpha-1, and others.
What we liked: True clinical oversight, licensed pharmacy sourcing, comprehensive protocols.
What to know: Higher cost; availability depends on current regulatory status of specific peptides.
Who Should Choose Tailor Made Health
Choose Tailor Made Health if:
- You want the widest peptide selection from a licensed provider
- You want a personalized protocol designed by an experienced clinical team
- You want a provider with deep longevity and optimization experience
Avoid Tailor Made Health if:
- You want the cheapest possible peptide access
- You only need a single standard peptide at a basic dose
- You want to avoid a detailed clinical intake before starting
2. Defy Medical — Best for Complex Protocols
Why it ranks #2: Deep experience with complex multi-compound protocols — the right choice when you need a knowledgeable practitioner who has seen it all.
Also featured in our TRT guide, Defy Medical has deep experience in peptide therapy alongside hormonal optimization. Their physicians can manage peptides alongside TRT in a coordinated way.
Who Should Choose Defy Medical
Choose Defy Medical if:
- You need a complex protocol combining peptides with TRT or other hormones
- You have had limited results with simpler single-peptide programs
- You want experienced practitioners familiar with multi-compound therapy
Avoid Defy Medical if:
- You want a simple single-peptide starting point with minimal intake
- You are price-sensitive and want the lowest-cost option
- You want the fastest possible onboarding without detailed assessment
3. Maximus — Best for GH Peptides at Scale
Why it ranks #3: Makes GH secretagogue peptides accessible through a scalable telehealth model — the easiest entry point for GH peptide therapy.
Maximus has added a GH peptide offering (Ipamorelin/CJC-1295) to their platform. For men already on Maximus who want to add growth hormone peptides, this is the most convenient route.
Who Should Choose Maximus
Choose Maximus if:
- You specifically want GH secretagogue peptides like Sermorelin or Ipamorelin
- You want a streamlined app-based experience with minimal complexity
- You want peptides within a broader health optimization framework
Avoid Maximus if:
- You need a broad peptide selection beyond GH secretagogues
- You want highly personalized or complex multi-compound protocols
- You want female-focused care or peptides outside the GH secretagogue category
Most Popular Peptides: What They Do
BPC-157 (Body Protection Compound)
The most widely used healing peptide. Evidence supports accelerated tendon/ligament healing, gut lining repair, reduced inflammation, and neuroprotective effects. Widely used among athletes for injury recovery.
CJC-1295 / Ipamorelin
A GH-releasing combination stack. Together they produce pulsatile GH release similar to natural secretion patterns. Used for body composition, sleep quality, recovery, and anti-aging.
TB-500 (Thymosin Beta-4)
A wound healing and anti-inflammatory peptide. Strong anecdotal support for muscle and tendon healing. Often combined with BPC-157.
Related Guides
FAQ
Is peptide therapy legal in the US?
When prescribed by a licensed physician from a licensed compounding pharmacy, yes. Research peptides sold for non-human use occupy a different legal space.
Are peptides safe?
Clinical peptides prescribed by physicians are generally well-tolerated at therapeutic doses. Research peptides without medical supervision carry more risk due to lack of oversight.
Do peptides require injections?
Most therapeutic peptides require subcutaneous injection. Some are available as oral capsules (less bioavailable) or nasal sprays.
How long does peptide therapy take to show results?
BPC-157 for healing: often within 2–4 weeks. GH peptides for body composition: 3–6 months of consistent use.
Can women use peptide therapy?
Yes. BPC-157, TB-500, GH peptides, and others are used by women. GH peptides are popular among women in their 40s–60s for body composition and energy.
What does GH peptide therapy actually do?
GH peptides stimulate the pituitary to release growth hormone in natural pulses. Effects include improved body composition, better sleep quality, faster recovery, and improved skin over time.
How do I find a legitimate peptide clinic?
Look for: a licensed physician involved in prescribing, dispensing from a 503A or 503B compounding pharmacy, and a full intake process including bloodwork.
What’s the cost of clinical peptide therapy?
Typically $150–$400/month for clinical protocols including physician oversight. Research peptides are significantly cheaper but come without medical guidance.
Can peptides be combined with TRT?
Yes. GH peptides + TRT is a common combination in performance medicine. This requires coordination through a physician who can manage both.
Do peptides cause long-term side effects?
Clinical data on long-term use is limited. GH peptides can reduce insulin sensitivity at high doses; monitoring is recommended. BPC-157 has a strong short-term safety profile.
What happened to BPC-157 availability?
The FDA’s bulk drug substance list updates have complicated compounding of BPC-157 and some other peptides. Availability from licensed compounders fluctuates. Check current status with your clinic.
Is peptide therapy covered by insurance?
Generally no. Peptide therapy is considered elective/off-label and is typically paid out of pocket.
Pricing and availability verified March 2026. See our Affiliate Disclosure and How We Rank. | See all comparison guides →