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Thymulin
Immune Modulation & Gut Health

Thymulin

A zinc-dependent peptide that supports immune balance, hormonal regulation, and neuroendocrine resilience.

Doctor-Prescribed
Lab-Tested Purity
Ships to Your Door
Satisfaction Guarantee
$270.00 (vial)
Strengthens immune response through T-cell regulation
Reduces chronic inflammation and autoimmune reactivity
Supports hormonal and nervous system balance via the HPA axis
May promote healthy aging and immune longevity
Zinc-dependent peptide for optimal biological activation

What is Thymulin?

Thymulin is a naturally occurring nonapeptide secreted by the thymus gland, essential for maintaining immune system performance and neuroendocrine balance. Its biological activity depends on zinc ions, which enable Thymulin to regulate T-cell differentiation, immune homeostasis, and stress-related hormonal responses. At PeptideWebMD, Thymulin therapy is doctor-prescribed and compounded in FDA-registered pharmacies, supporting individuals interested in immune optimization, inflammation control, and longevity-focused peptide protocols.

Note: This product is not approved by the FDA. It is available only via prescription under the supervision of a licensed healthcare provider.

Science & Mechanism of Action

Thymulin plays a key role in the immune-endocrine interface, modulating both T-cell activity and hormonal stress response pathways. Through these pathways, Thymulin helps restore immune balance, improve stress resilience, and counteract age-related immune decline.

1

T-Cell Maturation and Responsiveness

Enhances differentiation and activation of T-cells for improved immune surveillance.

2

Cytokine Modulation

Balances pro- and anti-inflammatory cytokine release, supporting immune stability.

3

Neuroendocrine Regulation

Influences the hypothalamic-pituitary-adrenal (HPA) axis to optimize hormonal response to stress.

4

Zinc-Dependent Activation

Zinc ions are required for Thymulin’s molecular stability and activity — making zinc synergy crucial for optimal performance.

Benefits & Clinical Applications

Scientifically supported benefits across multiple health concerns

For Immune Health

  • Supports T-cell activity and immune system recovery
  • Enhances defense after illness, stress, or immune suppression
  • Helps regulate autoimmune and inflammatory conditions

For Hormonal & Neurological Balance

  • Modulates cortisol and hormonal signaling
  • Supports HPA axis homeostasis for better stress adaptation
  • Studied for potential use in neurodegenerative disorders

For Anti-Aging & Longevity

  • Reduces immune senescence associated with aging
  • Supports systemic recovery and cellular protection
  • Complements peptides like Thymosin Alpha-1 (TA-1) for full-spectrum immune optimization

Physician-Guided Protocol

Safe, effective dosing under medical supervision

For educational reference only. All doses are determined after doctor evaluation.

Typical Treatment Protocol

Delivery Method
Subcutaneous injection or intranasal spray (as clinically advised)
Typical Range
100–300 mcg per dose
Duration
2–4 week cycles, adjustable based on immune response goals

Note: All protocols are prescribed and monitored by licensed physicians. Dosing varies based on individual needs, injury severity, and treatment goals. Do not self-administer without medical guidance.

Safety Profile & Considerations

Transparent information about side effects and contraindications

Common Side Effects

  • Occasional fatigue or slight injection site irritation; generally well-tolerated in research and clinical applications.

Who Should Avoid

  • Not advised for individuals with thymus abnormalities, acute autoimmune flare-ups, or without medical supervision.
Doctor

Thymulin bridges immunity and hormonal balance — a unique peptide that not only strengthens defense mechanisms but also supports neuroendocrine stability, making it a powerful tool in longevity and immune modulation.

Dr. Jonathan Hinds, MD, FAAMFM, ABAARM Medical Director, PeptideWebMD

Frequently Asked Questions

Common questions about Thymulin

Is Thymulin the same as Thymosin? +

No. Thymulin is distinct — it regulates immune and neuroendocrine function, while Thymosins like TA-1 and TB-4 primarily support immune defense and tissue repair.

Why is zinc important for Thymulin? +

Zinc is essential for Thymulin’s structural integrity and biological activation, making zinc supplementation beneficial during therapy.

Can Thymulin be combined with other immune peptides? +

Yes. It is often paired with Thymosin Alpha-1, LL-37, or KPV to enhance immune resilience and recovery.

Is Thymulin beneficial for stress or fatigue? +

Yes. Thymulin influences the HPA axis and helps rebalance stress hormone signaling, improving resilience and energy regulation.