Peptide Therapy: What It Is, How It Works, and How to Get Started

Interest in peptide therapy has grown substantially over the past several years, driven by a combination of emerging research, increased availability through telehealth, and growing public awareness of these compounds. Yet for many people, the term "peptide therapy" remains vague — they have heard of it, they may have seen it mentioned alongside wellness or anti-aging discussions, but they do not fully understand what it involves.

This guide provides a clear, research-grounded explanation of what peptide therapy is, how the most commonly prescribed peptides work, what the published science actually supports, and how to access treatment through a licensed telehealth provider.

What Are Peptides?

Peptides are short chains of amino acids — the same building blocks that make up proteins. While proteins are large, complex molecules containing hundreds or thousands of amino acids, peptides are smaller, typically containing between 2 and 50 amino acids linked together. This smaller size gives peptides specific biological functions and allows them to act as signaling molecules in the body.

Your body naturally produces thousands of peptides. They serve as hormones, neurotransmitters, and cellular messengers. Insulin is a peptide. Oxytocin is a peptide. The GLP-1 that your gut produces after a meal is a peptide. These molecules regulate nearly every system in your body — from metabolism and immune function to tissue repair and sleep.

Peptide therapy involves administering specific peptides to support or enhance biological processes that may be underperforming due to aging, illness, injury, or other factors. The peptides used in therapy are either identical to those your body produces or are modified versions designed to be more stable or targeted.

How Peptide Therapy Works

Unlike broad-spectrum pharmaceuticals that often affect multiple systems simultaneously, peptides tend to be highly specific in their action. Each peptide has a particular receptor or pathway it interacts with, which is one reason why the side effect profiles of many peptides tend to be relatively targeted.

Peptide therapy works through several general mechanisms, depending on the specific peptide:

Receptor activation. Many therapeutic peptides bind to specific receptors on cell surfaces, triggering downstream cellular responses. For example, growth hormone-releasing peptides bind to receptors in the pituitary gland to stimulate the natural release of growth hormone.

Signaling modulation. Some peptides influence signaling pathways involved in inflammation, tissue repair, or immune response. They do not replace a missing substance — they adjust how your existing systems communicate.

Cofactor support. Peptides like NAD+ precursors support enzymatic processes at the cellular level, providing raw materials that cells need for energy production, DNA repair, and other fundamental functions.

Most peptide therapies are administered via subcutaneous injection (a small needle under the skin, similar to an insulin injection). Some peptides are also available in oral, sublingual (under the tongue), or nasal spray formulations, though absorption and bioavailability vary by delivery method.

The Most Commonly Prescribed Peptides

BPC-157 (Body Protection Compound-157)

BPC-157 is a synthetic peptide derived from a protective protein found in human gastric juice. It consists of 15 amino acids and has been the subject of extensive preclinical research.

What the research shows:

BPC-157 has been studied primarily in animal models, where it has demonstrated effects on angiogenesis (the formation of new blood vessels), tendon and ligament healing, gut mucosal integrity, and inflammation modulation. Published studies in journals including the Journal of Physiology-Paris, Current Pharmaceutical Design, and Life Sciences have documented these effects in rodent models.

A 2022 systematic review published in the International Journal of Molecular Sciences examined the preclinical evidence for BPC-157 and noted its consistent effects on tissue repair pathways across multiple organ systems in animal studies.

Important context: The majority of BPC-157 research has been conducted in animal models. While the preclinical evidence is extensive, large-scale randomized controlled trials in humans have not yet been completed. Providers who prescribe BPC-157 do so based on the available preclinical evidence, clinical observation, and patient-reported outcomes. Results may vary, and patients should have realistic expectations.

Common uses in clinical practice: Providers may prescribe BPC-157 for patients dealing with soft tissue injuries, gut health concerns, or recovery support. It is typically administered as a subcutaneous injection, with treatment courses lasting several weeks.

NAD+ (Nicotinamide Adenine Dinucleotide)

NAD+ is not technically a peptide — it is a coenzyme — but it is commonly included under the peptide therapy umbrella because it is frequently prescribed alongside peptides and administered through similar clinical protocols.

NAD+ is a molecule present in every cell of your body. It plays a critical role in energy metabolism, DNA repair, gene expression regulation, and cellular signaling. Research has established that NAD+ levels decline significantly with age — a process that has been linked to various aspects of age-related physiological decline.

What the research shows:

The connection between NAD+ decline and aging has been documented in peer-reviewed research published in journals including Science, Cell Metabolism, and Nature Aging. Studies on NAD+ precursors (such as NMN and NR) have shown that supplementation can raise NAD+ levels in human tissue, and animal studies have demonstrated improvements in metabolic function, cognitive performance, and markers of cellular aging.

Administration: NAD+ therapy is available via intravenous (IV) infusion, subcutaneous injection, and oral or sublingual supplementation. IV and injectable forms offer higher bioavailability but require clinical oversight. Oral forms are more accessible but have lower absorption rates.

Sermorelin

Sermorelin is a growth hormone-releasing hormone (GHRH) analog consisting of 29 amino acids. Rather than introducing growth hormone directly into the body, Sermorelin stimulates the pituitary gland to produce and release its own growth hormone. This distinction is significant — it means the body's natural feedback mechanisms remain intact.

Published research has examined Sermorelin's effects on body composition, sleep quality, and growth hormone dynamics in adults. Treatment typically involves daily subcutaneous injections, often administered before bedtime to align with the body's natural growth hormone release cycle.

TB-500 (Thymosin Beta-4 Fragment)

TB-500 is a synthetic fragment of Thymosin Beta-4 (TB4), a naturally occurring peptide involved in cell migration, blood vessel formation, and tissue repair. TB4 is found in high concentrations at injury sites, where it plays a role in the body's natural healing processes.

Like BPC-157, the clinical evidence for TB-500 is primarily preclinical. Providers who prescribe TB-500 do so based on the available research, clinical experience, and patient-reported outcomes.

Who May Benefit from Peptide Therapy

Peptide therapy is not a one-size-fits-all treatment. The patients who tend to derive the most benefit are those with specific clinical needs that align with what the available research supports. Common patient profiles include:

• Adults experiencing age-related decline. As the body ages, natural peptide and hormone production decreases. Patients experiencing reduced energy, slower recovery, changes in body composition, or diminished sleep quality may benefit from peptides like Sermorelin or NAD+.
• Patients recovering from soft tissue injuries. Those dealing with tendon, ligament, or musculoskeletal injuries may be candidates for BPC-157 or TB-500.
• Individuals seeking gut health support. BPC-157's origins as a gastric peptide and its researched effects on gut mucosal integrity make it a common consideration.
• Patients interested in proactive health optimization. Some patients pursue peptide therapy as part of a preventive approach. NAD+ therapy is commonly sought for this purpose.

Peptide therapy requires a prescription from a licensed provider. A thorough medical evaluation should always precede treatment.

How Telehealth Works for Peptide Therapy

1. Initial Health Assessment — Complete a comprehensive health questionnaire covering medical history, medications, symptoms, and goals.
2. Lab Work — Baseline blood work including CBC, metabolic panel, hormone levels, and inflammatory markers.
3. Provider Consultation — A licensed provider reviews results and discusses which peptides may be appropriate.
4. Treatment Plan — Personalized plan specifying peptides, dosing, administration method, and duration.
5. Medication Delivery — Peptides shipped directly to your home with supplies and instructions.
6. Ongoing Monitoring — Regular follow-ups for progress assessment and dosing adjustments.

Getting Started

Peptide therapy represents a growing area of clinical medicine. The most important step is working with a qualified provider who can evaluate your individual health profile, set realistic expectations, and provide ongoing monitoring throughout treatment.

This article is for educational purposes only and does not constitute medical advice. Peptide therapy should only be pursued under the supervision of a licensed healthcare provider.