Metabolic Longevity · 10mg × 10 vials
In plain terms: Thymalin is a research compound - injectable, fast-acting and well studied.
Thymalin is the Khavinson thymic bioregulator: a low-molecular-weight polypeptide complex extracted from calf thymus tissue, developed at the St. Petersburg Institute of Bioregulation and Gerontology under Vladimir Khavinson starting in the 1970s. Unlike Thymosin Alpha-1 (a single defined 28-amino-acid synthetic peptide), Thymalin is a mixture of short peptides (mostly di- to tetra-peptide fractions, MW under 10 kDa) co-extracted from thymic tissue and standardized by biological activity rather than by a single sequence. The active fraction inspired the synthetic dipeptide Thymogen (Glu-Trp) and later the synthetic tetrapeptide Thymalfasin / Tα1, but Thymalin itself is the original extract-based bioregulator and is used in Russian clinical practice as such. Mechanism is restorative rather than agonist: Thymalin drives age-suppressed thymocytes through maturation back into functional T-cell subsets, restores the CD4/CD8 ratio toward a younger pattern, normalizes NK cell activity, and rebalances cytokine output (raises IL-2 in immunosuppressed states, dampens IL-6 in chronic inflammation). It also has documented effects beyond pure immune signaling: Khavinson's group reported gene-expression normalization (Mybl1, Per1, IGF-1) in elderly cohorts, plus restoration of antioxidant defense (SOD, glutathione peroxidase). In plain customer language: Thymalin is the original "thymic reset" peptide complex, it pulses the thymus back toward a younger pattern of immune output, and the effects persist long after the 10-day course because the changes are in cellular populations and gene expression rather than receptor occupancy.
Typical dose ranges by experience level - educational reference. Message us and we tailor it to you.
This is the conservative entry dose for longevity-curious customers who want to test the thymic bioregulator pathway before committing to the full Khavinson protocol. One TY10 kit (10 vials × 10 mg = 100 mg total) covers two full 10-day pulses at 5 mg/day, so a single kit yields a year of biannual pulsing for a beginner. Subjective signal during the pulse is mild: most users report nothing dramatic during the 10 days; the benefit shows up as fewer minor illnesses, faster recovery from colds, and steadier baseline energy over the months between pulses.
10 mg/day for 10 days is the dose used in the published Khavinson elderly cohort studies (Khavinson + Morozov 2003, Korkushko 2007). One TY10 kit (100 mg total) covers exactly one 10-day intermediate pulse, so customers running biannual intermediate pulses go through two kits per year. This is the dose almost every Khavinson-protocol customer should land on after their first beginner pulse confirms tolerance.
20-day protocols come straight from the older Russian elderly mortality cohorts (Khavinson + Morozov 12-year follow-up used 10 mg/day IM for 5-day courses repeated 2× per year for 6 years, but the original 1970s-80s Petersburg Institute work also documented 20-day continuous IM courses in elderly patients). Advanced users almost universally pair the Thymalin pulse with a concurrent Epithalon pulse during the same 10-20 day window, since that's the Khavinson "stack the deck" protocol the published mortality reduction was demonstrated on. The 10 mg BID compression protocol is community-driven rather than from Khavinson originals and used mainly by customers wanting to fit a full course into a single travel-free 10-day window.
Straight talk - what people actually report, and what the studies measured.
Peer-reviewed studies and clinical guidelines - tap any to read the source.
the headline 12-year follow-up cohort study running Epithalamin + Thymalin in elderly subjects, 1.6-1.8x reduction in all-cause mortality versus controls
Read study ↗PubMedAnisimov VN, Khavinson VK - Peptide bioregulation of aging: results and prospects, Biogerontology 2010comprehensive review of the Khavinson peptide bioregulator program including Thymalin and Epithalon
Read study ↗PubMedKhavinson VK - Peptides and Ageing, Neuro Endocrinol Lett 2002, vol 23 suppl 3foundational review of the thymic and pineal bioregulators including Thymalin's clinical history
Read study ↗PubMedKorkushko OV, Khavinson VK et al - Geroprotective effects of peptide bioregulators in the elderly, Bull Exp Biol Med 2006-2007clinical cohort in elderly subjects showing immune biomarker normalization and reduced morbidity from biannual Thymalin pulses
Read study ↗PubMedKhavinson VK - Tissue-specific peptides as bioregulators in mammals: review of 40 years of research, Adv Gerontol 2014overview of the Cytomax bioregulator series including Thymalin among 20+ tissue-derived peptide preparations
Read study ↗PubMedGoncharova ND, Khavinson VK - Effect of Thymalin on the function of the pituitary-adrenal axis in elderly subjects, Bull Exp Biol Med 2003Thymalin's effect on cortisol rhythm and HPA-axis normalization in aging cohorts
Read study ↗Aggregated sentiment from public forums & socials - real-world reports, not individual endorsements.
Subtle to no perceptible signal during the 10-day pulse: this is the most consistent community theme. Unlike Epithalon (which gives vivid dreams and sleep improvement during the pulse), Thymalin is often felt as nothing during the course. The benefit emerges over the 6 months between pulses as "I didn't get sick this winter" or "colds are shorter" rather…
Mild fatigue or "immune flare" feeling in the first 2-3 days of the pulse: occasional, attributed to immune system reactivation, resolves on its own. Less commonly reported than with Tα1.
Injection site stinging: occasional, generally mild, more often on the abdomen than the thigh
Mood lift / steadier baseline energy in the weeks after a pulse: a subset of users report this as a downstream signal, attributed to cytokine rebalancing
Vivid dreams: occasionally reported when stacked with concurrent Epithalon (more likely attributable to the Epithalon side of the stack)
Skepticism about whether anything happened: relatively common in the small community of users, since the signal is subtle and the evidence base is mostly Russian-language. Customers running Thymalin without concurrent Epithalon often report wondering if they wasted money. With concurrent Epithalon the experience feels more "real" because the Epithalon…
Route: SubQ injection is the PP default; IM is documented in the original Khavinson Russian protocols (Petersburg Institute used IM exclusively in elderly cohort studies). Either route works, IM has slightly faster systemic distribution; SubQ is the community-standard outpatient route.
Injection site: abdomen, outer thigh, or upper outer arm; rotate sites across the 10-day pulse since you're hitting the same site daily.
Storage: refrigerated, ~28 days after reconstitution. The polypeptide complex is reasonably stable but should be used within the pulse window anyway (a 10-day pulse falls well inside the 28-day shelf). Lyophilized vials store room temp short-term, refrigerate or freeze for longer hold.
Notes: No strict timing window. Evening dosing pairs well with concurrent Epithalon pulses (both biannual, both 10-day) when running the classic Khavinson combo. Don't shake the vial; swirl gently to dissolve. The complex is biological extract rather than a defined synthetic, so batch-to-batch potency depends on supplier QC; ask for the COA/assay where available.