What Is Peptide Therapy? A Comprehensive Guide to BPC-157, TB-500, NAD+, and Tirzepatide

Peptide therapy represents one of the most exciting frontiers in functional and regenerative medicine — a class of interventions that work with the body’s own signaling systems rather than overriding them. Yet for most patients, the term “peptide therapy” remains vague: something associated with longevity clinics and biohackers, but not clearly understood as a legitimate, physician-supervised medical tool. This guide explains what peptides are, how peptide therapy works, and what the current evidence shows for the four peptides Dr. Gomes currently offers.

What Are Peptides?

Peptides are short chains of amino acids — the same building blocks that make up proteins. While proteins may contain thousands of amino acids folded into complex three-dimensional structures, peptides are typically 2 to 50 amino acids in length. This smaller size gives them specific advantages: they can cross biological barriers more easily, bind to specific receptors with precision, and be degraded and cleared from the body relatively quickly, reducing the risk of accumulation and side effects.

How Peptides Signal the Body

Peptides act as biological messengers — they bind to specific receptors on cell surfaces and trigger precise cellular responses. Growth hormone-releasing peptides signal the pituitary to release growth hormone. Melanocortin peptides regulate pigmentation and appetite. Thymosin peptides regulate immune function and repair. BPC-157 interacts with the nitric oxide system to promote vascular growth and tissue repair. Each peptide has a specific receptor target and a specific downstream effect.

BPC-157: The Body Protection Compound

BPC-157 (Body Protection Compound 157) is a synthetic pentadecapeptide derived from a protein found naturally in human gastric juice. It has been studied extensively in animal models for its remarkable healing properties and has accumulated a growing body of anecdotal and early human evidence that supports its use in clinical practice.

What BPC-157 Is Used For

• Tendon, ligament, and muscle healing — reduces healing time significantly in injury models
• Gut lining repair — demonstrated healing of intestinal fistulas and inflammatory bowel conditions in studies
• Reduction of systemic and localized inflammation
• Neuroprotective effects — animal studies show protection against traumatic brain injury
• Often combined with TB-500 for synergistic musculoskeletal recovery

TB-500: Thymosin Beta-4 for Recovery and Regeneration

TB-500 is a synthetic version of the naturally occurring peptide Thymosin Beta-4, which is found in virtually every cell in the body and plays a fundamental role in cell migration, repair, and differentiation. TB-500 has been studied particularly for its role in cardiac, ocular, and musculoskeletal tissue repair.

Clinical Applications of TB-500

• Promotes cellular migration to sites of injury — speeds the delivery of repair cells
• Reduces acute and chronic inflammation
• Supports recovery from musculoskeletal injuries, particularly when combined with BPC-157
• May reduce scar tissue formation through regulation of actin polymerization
• Preliminary cardiac research suggests cardioprotective effects after ischemic events

NAD+: Cellular Energy and Longevity

Nicotinamide Adenine Dinucleotide (NAD+) is not a peptide in the traditional sense, but functions as a therapeutic molecule in the same clinical category. It is a coenzyme present in every cell, essential for the function of mitochondria, DNA repair enzymes (sirtuins and PARPs), and hundreds of metabolic reactions. NAD+ levels decline significantly with age — by an estimated 50% between age 40 and 60 — and this decline is increasingly implicated in the biology of aging and age-related disease.

• Mitochondrial function: NAD+ is essential for oxidative phosphorylation and ATP production
• DNA repair: sirtuin activation by NAD+ drives genome stability and epigenetic health
• Cognitive function: NAD+ supports neuronal energy metabolism and neuroprotection
• Addiction recovery: NAD+ IV therapy has been used in medically supervised detox protocols
• Metabolic health: NAD+ improves insulin sensitivity and mitochondrial efficiency

Tirzepatide: Metabolic Medicine’s New Standard

Tirzepatide (Mounjaro/Zepbound) is a dual GIP/GLP-1 receptor agonist that represents the most significant advance in metabolic pharmacology in decades. It simultaneously activates two separate hormonal pathways involved in glucose regulation and appetite, producing weight loss and metabolic improvements that exceed previous GLP-1 therapies significantly.

• Average weight loss of 15–22% of body weight in clinical trials — superior to any previous pharmacological intervention
• Dramatic HbA1c reduction in type 2 diabetes — often producing near-normal glycemic control
• Reduction in cardiovascular risk factors: blood pressure, triglycerides, inflammatory markers
• Improved insulin sensitivity independent of weight loss
• Available to established patients as part of a comprehensive metabolic protocol at Optimal Health & Wellness

Is Peptide Therapy Right for You?

Candidacy for any peptide therapy is determined during a comprehensive functional medicine consultation. Dr. Gomes evaluates your complete health picture, current medications, lab values, and specific health goals before making any recommendation. Peptide therapy is never prescribed in isolation — it is integrated into a comprehensive functional medicine protocol addressing the root causes of your specific condition.

• Available to established patients following an initial comprehensive consultation
• Supervised and monitored with regular follow-up appointments
• Integrated with dietary, lifestyle, and other therapeutic interventions
• Available in-office and via telehealth for established patients in all six licensed states