What Are Peptides?
Your body naturally produces thousands of peptides. Hormones like insulin and growth hormone are themselves peptides. The peptides used therapeutically are either identical to naturally occurring peptides or are analogs designed to mimic their action with greater stability or potency.
Most therapeutic peptides are administered via subcutaneous injection (a tiny insulin-style needle under the skin), though some are available as oral supplements, nasal sprays, or topical creams depending on the application.
Because peptides work by signaling rather than replacing, they tend to have favorable safety profiles when used under medical supervision — the body can respond to them as it would to its own signals.
Commonly Used Peptides and What They Do
Sermorelin / Ipamorelin / CJC-1295 (Growth Hormone Secretagogues) — These peptides stimulate the pituitary gland to produce and release more growth hormone naturally. Benefits include improved body composition, better sleep quality, enhanced recovery, and increased energy. Because they stimulate your own GH production rather than replacing it, they avoid the risks associated with exogenous HGH.
BPC-157 (Body Protection Compound) — One of the most studied peptides for tissue repair. BPC-157 accelerates healing of tendons, ligaments, and muscles, reduces inflammation, and may have gastrointestinal protective effects. Popular among athletes recovering from injury.
TB-500 (Thymosin Beta-4) — Works synergistically with BPC-157 for injury recovery, particularly for chronic or hard-to-heal injuries. Promotes angiogenesis (new blood vessel formation) and reduces inflammation.
PT-141 (Bremelanotide) — A melanocortin receptor agonist used for sexual dysfunction in both men and women. Unlike PDE5 inhibitors, it works centrally through the brain rather than the vascular system.
Semaglutide / Tirzepatide — Technically GLP-1 peptides (discussed in detail in our weight loss guide).
AOD-9604 — A peptide derived from growth hormone that specifically targets fat metabolism without the growth-promoting effects of full HGH.
Selank / Semax — Nootropic peptides that support cognitive function, focus, and stress resilience.
Who Benefits From Peptide Therapy?
Peptide therapy isn't exclusively for elite athletes or biohackers. A wide range of patients see meaningful benefit:
• Adults 35+ experiencing age-related decline in recovery, sleep quality, or body composition
• Athletes or active individuals dealing with chronic or slow-healing injuries
• Men or women experiencing sexual dysfunction who haven't responded to other approaches
• Patients seeking cognitive support and stress resilience
• Those interested in proactive aging strategies as part of a broader wellness program
The best results come from combining peptide therapy with appropriate lifestyle factors — nutrition, sleep, resistance training — and often with other hormonal optimization.
Safety and What to Expect
Peptide therapy has a well-established safety record when administered under medical supervision. Side effects depend on the specific peptide but are generally mild — injection site reactions, transient flushing, or water retention with growth hormone secretagogues are the most common.
At Peak Medical Wellness, we conduct a comprehensive evaluation before recommending any peptide protocol. We review your labs, health history, and goals to determine which peptides — and at what doses — make sense for you.
Most patients begin to notice effects within 4–8 weeks. Growth hormone-related benefits (body composition, sleep, recovery) typically require 3–6 months for full effect.
It's important to source peptides through a legitimate medical provider. Peptides purchased online without a prescription vary widely in purity and concentration — both safety and efficacy are compromised.
Explore Peptide Therapy at Peak Medical Wellness
Our Fort Collins providers can help you determine whether peptide therapy fits your goals. Book a consultation and we'll walk you through the options.