Thymulin (FTS) vs Thymalin — Peptide Comparison

Thymulin (FTS) vs Thymalin — Peptide Comparison Thymulin (FTS) vs Thymalin — compare dosing, benefits, safety profiles, side effects, and how they stack. See which peptide is right for you. At a Glance Dose Range Thymulin (FTS) 100–500 mcg Thymalin 5–10 mg Frequency Once daily Administration Subcutaneous injection Intramuscular injection Cycle Length 4-6 weeks Onset Speed Moderate (1-2 weeks) Evidence Level Limited human trials Efficacy Immune Restoration Anti-Inflammatory Age-Related Immune Decline Longevity Support Disease Prevention Technical Data Molecular Formula C33H54N12O15 Molecular Weight 858.9 g/mol Half-Life Approximately 2 hours Bioavailability Low oral bioavailability (injected administration required) CAS Number 63958-90-7 Complex mixture; active dipeptide EW: C16H19N3O5 Polypeptide complex; components 250-1000 Da; active dipeptide EW ~321 Da Not precisely characterized for complex; immune effects persist weeks post-administration High via intramuscular or subcutaneous injection Protocols standard 1-2 mg Once daily (often dosed in the evening) 10-20 day courses, repeated cyclically Research-practice dosing for immune support; thymulin requires injectable delivery due to low oral bioavailability and a zinc ion for activity, so zinc co-supplementation is commonly paired [1]. starting 100-400 mcg Three times weekly Several weeks Lower microgram-range intradermal dosing is used in some research protocols as a conservative entry point [1]. 5-10 mg reconstituted in saline 5-10 day course, often repeated every 6 months Reflects the Russian clinical course used in immune-restoration and gerontology protocols, typically 10 mg IM daily for 5-10 days [1]. advanced 10 mg Up to 20 day course, repeated every 6 months Subcutaneous administration is used in community practice at the same 10 mg daily dosing; longer 20-day courses are described for cyclical immune support [1]. Applications Thymulin levels naturally drop significantly in elderly populations. Supplementation can restore T cell maturation and immune responsiveness in aging. Research shows thymulin can reverse age-related thymic involution and restore helper/suppressor T cell balance. Recovery from Severe Malnutrition In severely malnourished individuals, the thymus shrinks and T cell development is impaired. In vitro studies show thymulin can restore T cell maturation even in those with thymic involution, making it useful in recovery protocols. Chronic Inflammatory Conditions Thymulin inhibits NF-κB activation and suppresses pro-inflammatory cytokines (IL-6, TNF-α, IL-8). Animal models show effectiveness in lung diseases, inflammatory pain, and neuroinflammation. Anti-inflammatory effects work through p38 MAPK suppression. Aging Adults Seeking Immune Support Thymalin is especially valuable for people over 55 whose thymus gland has naturally shrunk with age. By stimulating thymic function, it helps restore the immune training center that your body relies on to fight infections and stay healthy. Longevity and Anti-Aging Protocols Clinical studies tracking patients for 6-8 years showed Thymalin reduced mortality by 2.0-2.1-fold. Combined with Epitalon, the mortality reduction reached an impressive 4.1-fold, making this combination one of the most studied longevity peptide protocols. Seasonal Illness Prevention Research shows Thymalin cuts respiratory infection rates by 2.0-2.4-fold. A short 10-day course before cold and flu season can significantly boost your immune defenses for months afterward. Safety Profile Common Local injection site reactions Mild fatigue or lethargy Transient headache Uncommon Mild fever or chills Sleep disturbance or vivid dreams Appetite changes Transient lymph node swelling Serious Severe allergic reaction Uncontrolled immune activation No side effects in most patients Mild injection site reaction Transient low-grade fever Mild flu-like symptoms Temporary headache Research Status FDA Status Research compound Safety Overview Thymulin is a naturally occurring thymic hormone with favorable safety profile in research. No reported serious adverse events in animal models even at high doses. Limited human safety data but observed studies suggest good tolerability. Requires concurrent zinc supplementation for biological activity and additional safety assurance. Most concerns relate to immune overactivation in susceptible individuals, not direct peptide toxicity. Contraindications xUncontrolled autoimmune disease xSevere zinc deficiency requiring IV repletion xThymic tumors or malignancies xPregnancy (limited safety data) Thymalin has an excellent safety profile based on over 40 years of clinical use in Russia. Most patients experience zero side effects, and the peptide complex has been described as 'practically non-toxic' in research literature. It has been used safely in thousands of patients, including elderly populations over extended periods. xActive thymic tumors or malignancies xKnown hypersensitivity to animal-derived peptide products xPregnancy and breastfeeding (insufficient safety data) xSevere uncontrolled autoimmune disease without medical supervision Decision Guide Choose Thymulin (FTS) if... Immune system restoration T cell maturation in immunocompromised states Age-related immune decline Chronic inflammatory conditions Choose Thymalin if... Immune system restoration in aging adults Longevity and healthy aging support Reducing infection frequency and severity Multi-system health optimization