NAD+ vs Thymalin
A neutral, side-by-side comparison of two anti-aging & longevity peptides — their mechanisms, dosing ranges, administration routes, side effects, and research evidence. For research and educational purposes only.
NAD+
NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme essential to cellular metabolism, DNA repair, and mitochondrial function. Levels decline with age. Research focuses on restoring NAD+ through precursors (NMN, NR) or direct IV/subcutaneous administration to support longevity and energy metabolism.
Full profileThymalin
Thymus-derived peptide bioregulator developed in Russia containing a mixture of low-molecular-weight peptides extracted from calf thymus. Primarily studied for reversing immunological aging (immunosenescence) and extending healthy lifespan. Vladimir Khavinson's longitudinal research on elderly patients links thymalin administration to significant improvements in immune markers and all-cause mortality reduction.
Full profile| NAD+ | Thymalin | |
|---|---|---|
| Category | Anti-Aging & Longevity | Anti-Aging & Longevity |
| Also known as | Nicotinamide Adenine Dinucleotide, NAD, NAD+ precursor | thymic peptide bioregulator, T-activin extract, thymus peptide, thymic bioregulator |
| Evidence | Preclinical only | Research-stage |
| Dosing range | 250mg–1000mg mg, daily (oral precursors) or weekly/monthly (IV/SubQ) | 5mg–20mg mg, 5–10 day course, 1–2x per year |
| Administration | Oral (precursors: NMN or NR), Intravenous infusion, Subcutaneous injection, Intranasal | Intramuscular injection, Subcutaneous injection |
| Key side effects | Flushing (especially IV), Chest tightness during rapid IV infusion, Nausea, Fatigue (transient, day of infusion) | Injection site reactions, Mild fever (rare), Temporary increase in immune activity (desired response), Rare hypersensitivity |
| Cited sources | 2 references | 2 references |
Key differences
- Evidence level differs: NAD+ is preclinical only, while Thymalin is research-stage.
- Administration: NAD+ — Oral (precursors: NMN or NR), Intravenous infusion, Subcutaneous injection, Intranasal; Thymalin — Intramuscular injection, Subcutaneous injection.
- Frequency: NAD+ is typically daily (oral precursors) or weekly/monthly (IV/SubQ); Thymalin is 5–10 day course, 1–2x per year.
How each works
NAD+
NAD+ is required for over 500 enzymatic reactions including those catalyzed by sirtuins (longevity-associated proteins) and PARPs (DNA repair enzymes). Rodent studies consistently show that restoring NAD+ levels reverses aspects of metabolic aging. Human trials with NAD+ precursors (NMN, NR) show improved muscle function, insulin sensitivity, and mitochondrial capacity in older adults.
Thymalin
Thymalin contains multiple bioactive peptides that stimulate T-lymphocyte differentiation and restore thymic function that declines with age. In Khavinson's 6-year controlled trial of elderly patients (78–89 years), annual thymalin courses were associated with significantly lower mortality and improved immune parameters vs. controls. Proposed mechanisms include telomerase activation in immune cells and restoration of thymic epithelial cell function.
This comparison aggregates public research and structured profile data for informational purposes only. It is not medical advice and does not recommend either compound for human use. Consult a qualified healthcare provider before considering any peptide.