Peptide Library
A plain-language reference for the 145 compounds Pep tracks — peptides, hormones, and ancillaries. Educational only.
Educational information only. Many listed compounds are not FDA-approved for human use. Consult a licensed clinician before starting, changing, or stopping any protocol.
Showing 145 of 145 compounds
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Small molecule NNMT enzyme inhibitor. Increases NAD+ levels in fat cells, promoting energy expenditure and reducing fat accumulation without affecting appetite.
Synthetic PTHrP analog and FDA-approved anabolic bone-building agent. Selectively activates PTH1 receptor to stimulate bone formation with lower hypercalcemia risk than teriparatide.
Prohibitin-targeting peptidomimetic designed to selectively disrupt blood supply to white adipose tissue. Highly experimental anti-obesity compound. Clinical development discontinued due to renal side effects.
Synthetic copper-binding tripeptide targeting dermal papilla cells and hair follicles. Stimulates hair growth and supports skin regeneration through fibroblast activation.
5-Aminoimidazole-4-carboxamide ribonucleotide, an AMPK activator that mimics AMP to enhance metabolic activity and endurance. Preclinical exercise mimetic compound.
Aromatase inhibitor (AI). Used to control estrogen levels during TRT. Brand name Arimidex.
Anti-Obesity Drug fragment of HGH (176-191). Targets fat metabolism without affecting blood sugar or growth.
An 11-amino-acid peptide modeled on the tissue-protective domain of erythropoietin that selectively activates the innate repair receptor, driving tissue protection and anti-inflammatory effects without raising red blood cell count. Studied for small-fiber and diabetic neuropathy.
Body Protection Compound-157. A pentadecapeptide derived from human gastric juice. Known for tissue healing, gut health, and injury recovery.
Pre-mixed blend of BPC-157 and TB-500, the most popular healing combination. Sold as a single combined vial from compounding pharmacies for injury recovery and tissue repair.
A synthetic adamantane derivative (actoprotector) marketed in Russia as Ladasten for asthenia and fatigue. It has mild dopaminergic, anti-fatigue, and stimulant-like actions without the rebound of classic stimulants. A small molecule, not a peptide.
AEDL tetrapeptide bioregulator for bronchial and lung tissue. Supports respiratory epithelial regeneration through DNA transcription pathway modulation.
A long-acting dopamine agonist used to lower elevated prolactin, which can impair libido and erectile function on TRT or with certain compounds. Dosed only twice weekly thanks to its ~65-hour half-life; monitor for valvular effects at higher doses.
Long-acting amylin receptor agonist for weight management. Combined with semaglutide in CagriSema, showing up to 22.7% weight loss in Phase III trials.
Weight blend combining the amylin analog cagrilintide with the GIP/GLP-1 dual agonist tirzepatide, targeting satiety and glycemic pathways together. No human trial of this exact combination; research-level, sold pre-blended.
Dual-mechanism weight blend pairing the long-acting amylin analog cagrilintide with the GLP-1 agonist semaglutide (1:1). Novo Nordisk's clinical program showed greater weight loss than either component alone. Sold as a single co-lyophilized vial.
AEDR tetrapeptide cardiovascular bioregulator. Supports cardiac gene regulation and cardiomyocyte metabolism. Studied for heart health and cardiovascular aging.
AED tripeptide bioregulator for cartilage and connective tissue health. Supports joint function and musculoskeletal tissue regeneration.
Standardized neuropeptide preparation with neurotrophic and neuroprotective properties. Used clinically in 50+ countries for stroke recovery, traumatic brain injury, and dementia treatment.
An oral Khavinson peptide bioregulator (peptide complex A-5) derived from calf brain tissue, targeting the central nervous system. Taken in capsule courses to support cognitive function and neuronal health.
EDG tripeptide bioregulator for bronchial and lung tissue. Supports respiratory integrity and mucosal health.
Modified GRF (1-29). Growth hormone releasing hormone analog. Often combined with Ipamorelin for synergistic GH release.
CJC-1295 with Drug Affinity Complex. Extended half-life version providing sustained GH elevation. Once or twice weekly dosing.
Triple GH secretagogue blend combining CJC-1295 (no DAC / Mod GRF 1-29) with two ghrelin mimetics, ipamorelin and GHRP-2, for amplified synergistic GH release. Sold as a single 9mg lyophilized vial.
Pre-mixed blend of CJC-1295 (no DAC) and Ipamorelin for synergistic growth hormone release. Classic GH secretagogue combination sold as a single vial.
A SERM used off-label in men to stimulate LH/FSH and raise natural testosterone while preserving sperm production, and as a post-cycle/fertility agent. It is a racemic mixture of enclomiphene and the long-lived estrogenic zuclomiphene.
AEDP tetrapeptide brain cortex bioregulator. Supports neuroprotection, cognitive function, and nerve regeneration through epigenetic regulation.
EDP tripeptide thymic bioregulator. Supports T-cell immunity and immune system balance, particularly CD3+ and CD4+ T-cell populations.
Dehydroepiandrosterone, an adrenal precursor hormone the body converts into testosterone and estrogen. Supplemented by men and women for hormone support, energy, and libido, often as part of an anti-aging or HRT stack.
Small peptide derived from angiotensin IV. Potent cognitive enhancer that promotes synaptic connectivity via HGF/MET signaling. Highly experimental with limited human data.
Delta Sleep Inducing Peptide. Promotes deep, restorative sleep. May help normalize sleep patterns.
Sleep and longevity blend combining Delta Sleep-Inducing Peptide (DSIP), studied for deepening slow-wave sleep, with Epithalon, a pineal-modulating tetrapeptide studied for circadian and anti-aging effects. Sold as a combo vial.
Once-weekly GLP-1 receptor agonist on an IgG4-Fc fusion platform that extends its half-life to about five days. Marketed as Trulicity for type 2 diabetes; enhances insulin secretion, suppresses glucagon, and reduces appetite.
The trans-isomer of clomiphene and a SERM that raises LH/FSH and endogenous testosterone in men with secondary hypogonadism while preserving fertility. Favored over clomiphene because it lacks the long-lived estrogenic zuclomiphene isomer.
An oral Khavinson peptide bioregulator (peptide complex A-8) targeting the pineal gland — the oral-capsule analog to the injectable Epithalon lineage. The most-studied compound in the Khavinson framework, tied to melatonin, circadian rhythm, and anti-aging research.
Synthetic tetrapeptide that stimulates telomerase production. May support cellular longevity and immune function.
Glycoprotein hormone that stimulates red blood cell production in bone marrow. FDA-approved for anemia in chronic kidney disease and chemotherapy patients. Improves oxygen-carrying capacity.
A steroidal, irreversible ('suicide') aromatase inhibitor that lowers estradiol by permanently binding the aromatase enzyme. Used on TRT or cycles to manage high estrogen; unlike anastrozole it does not cause a rebound.
GLP-1 receptor agonist derived from exendin-4 that increases glucose-dependent insulin release, suppresses glucagon, and slows gastric emptying. Available as immediate-release Byetta (twice daily) and extended-release Bydureon (once weekly).
A 15-amino-acid synthetic mimetic of the neural cell adhesion molecule (NCAM) that acts as an FGFR1 agonist. In preclinical research it promotes neurite outgrowth, synaptic plasticity, and memory, with neuroprotective effects. Not approved for human use.
A 5-alpha reductase inhibitor that blocks conversion of testosterone to DHT, reducing serum DHT by ~65%. Used on TRT to manage androgenic hair loss and prostate symptoms. Be aware of potential sexual side effects.
The mature, circulating form of follistatin (the active product FST-344 is cleaved into in vivo). It binds and neutralizes myostatin and activin, removing a brake on muscle growth; its lower cell-surface affinity suits body-wide effects. Distinct from Follistatin 344.
Protein that binds and neutralizes myostatin, a negative regulator of muscle growth. May support increased lean muscle mass. Very limited human clinical data.
Senolytic peptide that selectively eliminates senescent cells accumulating with aging. Uses D-retro-inverso modification to disrupt the FOXO4-p53 interaction with enhanced stability.
Growth Differentiation Factor 11, a TGF-beta superfamily protein popularized by parabiosis ('young blood') studies suggesting it reverses age-related decline. Findings remain controversial, as early assays could not distinguish it from myostatin. Research-only.
Copper peptide with regenerative properties. Supports skin health, wound healing, and hair growth.
A synthetic growth-hormone-releasing peptide (ghrelin-receptor agonist) that stimulates pituitary GH secretion via a pathway distinct from GHRH. The original GHRP from which ipamorelin was later derived; typically pulsed subcutaneously, often stacked with a GHRH.
Growth Hormone Releasing Peptide-2. Stronger GH release than GHRP-6 with less hunger effect.
Growth Hormone Releasing Peptide-6. Strong GH release with significant hunger increase. Good for those needing appetite stimulation.
Multi-peptide skin rejuvenation blend combining GHK-Cu, TB-500, and BPC-157 in a 5:1:1 ratio. Promotes skin regeneration, collagen synthesis, and tissue healing. Sold as a single pre-mixed vial.
Tripeptide antioxidant naturally produced in all cells. Injectable form bypasses poor oral bioavailability. Supports detoxification, immune function, and skin brightening.
Synthetic gonadotropin-releasing hormone (GnRH) that stimulates pituitary release of FSH and LH. Used alongside TRT to maintain testicular function and natural hormone production. Common alternative to HCG.
Human Chorionic Gonadotropin. Used alongside TRT to maintain testicular function and fertility.
Potent growth hormone releasing peptide. Produces strong GH pulse but may desensitize with prolonged use. Commonly cycled on and off.
Recombinant human growth hormone. Used for GH deficiency, anti-aging, and body composition optimization. Requires careful dosing and monitoring via bloodwork.
Synthetic peptide corresponding to the C-terminal 176-191 region of human growth hormone, retaining GH's lipolytic (fat-mobilizing) activity while omitting the diabetogenic region. Distinct from AOD-9604 (a modified analog of this fragment).
Human Menopausal Gonadotropin containing FSH and LH in 1:1 ratio. FDA-approved for fertility treatment in both men and women. Used alongside TRT to maintain spermatogenesis.
First mitochondria-derived peptide discovered, encoded from mitochondrial DNA. Demonstrates cytoprotective and anti-apoptotic properties with particular relevance for neurological health and longevity.
A truncated IGF-1 analog (Des(1-3) IGF-1) lacking the N-terminal tripeptide, which sharply reduces IGF-binding-protein sequestration and gives strong, localized anabolic activity. Its very short half-life leads users to inject it near the target muscle post-workout.
Long-acting analog of insulin-like growth factor 1 with extended half-life. Promotes muscle growth, recovery, and cellular repair. More potent than native IGF-1.
Four-peptide cognitive enhancement blend combining NA-Selank, NA-Semax, PE-22-28, and Pinealon. Targets neuroprotection, cognitive enhancement, and mood support. Sold as a single pre-mixed vial.
Growth hormone releasing peptide (GHRP). Selective GH release without significant hunger or cortisol increase.
Neuropeptide that stimulates GnRH release, triggering natural testosterone and reproductive hormone production. Used for hormonal assessment and reproductive health support.
Four-peptide regenerative blend combining GHK-Cu (50mg), KPV (10mg), BPC-157 (10mg), and TB-500 (10mg). Advanced healing and anti-inflammatory protocol. Sold as a single 80mg pre-mixed vial.
Tripeptide derived from alpha-MSH with potent anti-inflammatory properties. Targets gut health, immune modulation, and inflammatory skin conditions.
Amino acid derivative essential for fatty acid transport into mitochondria for energy production. Injectable form provides higher bioavailability than oral supplements.
An 8-amino-acid tight-junction regulator that acts as a zonulin antagonist to restore intestinal barrier function and reduce 'leaky gut' permeability. The most clinically advanced peptide for celiac disease; taken orally before meals.
A potent non-steroidal aromatase inhibitor that strongly suppresses estradiol. Used to manage estrogen on TRT/cycles and to treat gynecomastia; because it is very powerful, low or every-other-day dosing is common to avoid crashing estrogen.
Lipotropic injection blend typically containing methionine, inositol, choline, and B12. Supports liver function and promotes fat metabolism.
Once-daily GLP-1 receptor agonist that enhances glucose-dependent insulin secretion, slows gastric emptying, and reduces appetite. FDA-approved as Saxenda (3.0mg) for weight management and Victoza (up to 1.8mg) for type 2 diabetes.
KEDA tetrapeptide liver bioregulator. Modulates chromatin structure in liver cells, supporting detoxification and hepatic function.
Once-daily GLP-1 receptor agonist with strong prandial action, aggressively slowing gastric emptying to blunt post-meal glucose spikes. Approved for type 2 diabetes and taken within one hour before the first meal.
Human cathelicidin antimicrobial peptide with broad-spectrum activity. Disrupts biofilms and modulates immune response. Gaining popularity for chronic infections.
Dual GLP-1 and glucagon receptor agonist combining appetite suppression with increased energy expenditure through thermogenesis. Phase III trials show up to 20% body weight loss.
Synthetic analog of alpha-MSH that stimulates melanin production for photoprotection. Milder side effect profile than Melanotan II. FDA-approved implant form (Scenesse) exists for EPP.
Synthetic melanocortin peptide. Promotes skin tanning and may affect libido. Requires UV exposure for tanning effect.
An oral DHT-derived androgen that binds SHBG to raise free testosterone and is used to support libido, erectile function, and mood on TRT. It is not an aromatase inhibitor despite the common myth.
Mechano Growth Factor, a non-pegylated IGF-1 splice variant produced in muscle tissue after mechanical stress. Very short half-life requiring post-workout administration.
Non-peptide ghrelin mimetic and growth hormone secretagogue. Oral administration with 24-hour duration. Increases GH and IGF-1 levels without affecting cortisol.
Mitochondrial-derived peptide that regulates metabolic homeostasis. Enhances exercise capacity, insulin sensitivity, and cellular energy production.
Enhanced anxiolytic nootropic with improved blood-brain barrier penetration. Modulates GABA, dopamine, and serotonin while increasing BDNF levels for anxiety relief and cognitive enhancement.
Enhanced and stabilized version of Semax with superior bioavailability. Crosses blood-brain barrier to enhance BDNF expression and hippocampal neuroplasticity for cognitive enhancement.
Nicotinamide adenine dinucleotide. Essential coenzyme for cellular energy production and DNA repair. Levels decline with age. Administered via injection to bypass digestive breakdown.
A synthetic dipeptide-derived nootropic (N-phenylacetyl-L-prolylglycine ethyl ester) roughly 1000x more potent by weight than piracetam. It modulates AMPA/NMDA receptors and upregulates BDNF and NGF. A small-molecule oral compound, not an injectable peptide.
A synthetic neurogenic small molecule that stimulates hippocampal neurogenesis, with Phase 2 data showing measurable hippocampal volume increase. Investigated for major depressive disorder and cognitive enhancement. Not a peptide.
First oral non-peptide GLP-1 receptor agonist. Small-molecule drug in Phase III trials for obesity and type 2 diabetes. Eliminates need for injections.
EDL tripeptide bioregulator for liver and gastrointestinal health. Supports hepatic detoxification and GI tissue cellular regeneration.
Naturally occurring hormone involved in social bonding, mood regulation, and reproductive function. Administered as nasal spray for anxiolytic and social benefits.
Nootropic peptide derived from ciliary neurotrophic factor (CNTF). Contains adamantane moiety enabling blood-brain barrier penetration for enhanced neurogenesis and cognitive function.
KEDW tetrapeptide pancreatic bioregulator. Regulates pancreatic gene expression (PDX1, NGN3, PAX6) to support glucose metabolism and beta-cell function.
Synthetic heptapeptide derived from Spadin. Acts as a TREK-1 potassium channel blocker with rapid antidepressant effects and enhanced neurogenesis. 300-500x more potent than full-length Spadin.
Pegylated Mechano Growth Factor with extended half-life from minutes to hours. Activates muscle satellite cells following mechanical stress or injury for enhanced recovery.
An arginate-salt formulation of the BPC-157 pentadecapeptide (also sold as 'PDA'). The arginine salt buffers the peptide across a wider pH range, improving stability and oral bioavailability versus the standard acetate form. Same healing uses as BPC-157.
A semi-synthetic sulfated polysaccharide (heparin-like) that stimulates cartilage matrix synthesis and inhibits cartilage breakdown while reducing joint inflammation. Studied for knee osteoarthritis; FDA-approved orally as Elmiron.
Synthetic tripeptide (Glu-Asp-Arg) with neuroprotective and cognitive-enhancing properties. Developed for brain health, memory support, and sleep quality improvement.
Synthetic analog of the pancreatic hormone amylin, used as a mealtime adjunct in insulin-treated diabetes. Slows gastric emptying, suppresses postprandial glucagon, and centrally reduces caloric intake; of interest as a partner to GLP-1 therapy.
KEDP tetrapeptide prostate bioregulator. Supports prostate tissue health through chromatin modulation and cell differentiation regulation.
Bremelanotide. Melanocortin receptor agonist used for sexual dysfunction. Works on central nervous system.
Sexual-health blend pairing the melanocortin agonist PT-141 (bremelanotide), which drives arousal and desire, with oxytocin, associated with bonding and intimacy. Sold as a single co-lyophilized vial.
An mTOR (mTORC1) inhibitor originally approved as an immunosuppressant, now widely tracked by longevity users for healthspan. It binds FKBP12 to inhibit mTORC1, promoting autophagy; typically pulsed weekly rather than daily. A small molecule, not a peptide.
Triple agonist targeting GIP, GLP-1, and glucagon receptors simultaneously. Phase III clinical trials have demonstrated the highest weight loss of any investigational drug in its class.
Metabolic blend pairing the triple agonist retatrutide (GIP/GLP-1/glucagon) with the amylin analog cagrilintide, described by vendors as a 'quad-pathway' stack. Investigational and unproven in humans as a combination.
Synthetic analog of the immune peptide tuftsin with anxiolytic and nootropic properties. Modulates GABA and serotonin systems without sedation or dependence.
GLP-1 receptor agonist in pre-filled pen form. Brand names include Ozempic, Wegovy. For weight management and type 2 diabetes.
GLP-1 receptor agonist in lyophilized vial form from compounding pharmacies. Requires reconstitution with bacteriostatic water.
Compounded GLP-1 weight formulation adding vitamin B12 (often with glycine) to semaglutide, marketed to support energy and offset GLP-1 fatigue. Widely offered by US compounding pharmacies and telehealth clinics.
Synthetic analog of ACTH (4-10) with nootropic and neuroprotective properties. Enhances BDNF expression and supports cognitive performance and focus.
Nootropic blend combining Semax (an ACTH(4-10) analog that modulates BDNF and focus) with Selank (a tuftsin analog with GABAergic anxiolytic activity). Frequently sold as a stable N-acetyl amidate nasal spray or lyophilized powder.
GHRH (1-29). Stimulates natural GH production. Considered one of the safest GH secretagogues.
Growth-hormone secretagogue blend pairing the GHRH analog sermorelin with two ghrelin-receptor agonists (GHRP-6, GHRP-2) to stimulate pulsatile GH release via parallel pathways. Sold as a single lyophilized vial (6mg or 9mg).
Synthetic pan-estrogen-related receptor agonist functioning as an exercise mimetic. Activates metabolic pathways and increases mitochondrial density. Preclinical compound with limited human data.
Synthetic octapeptide (Acetyl Octapeptide-3) functioning as a topical anti-wrinkle agent. Targets dynamic facial wrinkles through SNARE complex modulation. Primarily used in skincare formulations.
Mitochondria-targeted tetrapeptide that stabilizes cardiolipin in the inner mitochondrial membrane. Reduces oxidative stress and supports cellular energy production.
Dual GLP-1 and glucagon receptor agonist. In clinical trials for obesity and metabolic dysfunction-associated steatohepatitis (MASH). Glucagon component enhances fat oxidation.
Blended testosterone product combining four esters (propionate, phenylpropionate, isocaproate, decanoate) at 250mg/mL. The staggered ester profile gives fast onset with a sustained tail; commonly dosed weekly for TRT.
An oral Khavinson peptide bioregulator (peptide complex A-7) targeting the liver. Taken in capsule courses to support healthy hepatic function, often paired with lipid-metabolism protocols.
A SERM that blocks estrogen at breast tissue, used by men to prevent or treat gynecomastia and as a post-cycle therapy agent to restore the HPG axis. Unlike aromatase inhibitors it does not lower systemic estradiol.
Thymosin Beta-4 fragment. Promotes cell migration, wound healing, and tissue repair. Often stacked with BPC-157.
FDA-approved anabolic bone-building agent comprising the first 34 amino acids of parathyroid hormone. Actively stimulates new bone formation for osteoporosis treatment.
Premium growth hormone secretagogue blend combining Tesamorelin and Ipamorelin. Enhances GH release with visceral fat reduction benefits. Sold as a single pre-mixed vial.
FDA-approved GHRH analog. Reduces visceral adipose tissue. Originally developed for HIV-associated lipodystrophy.
Growth-hormone blend combining two GHRH analogs (tesamorelin, prized for visceral fat reduction, plus CJC-1295 Mod GRF 1-29) with the selective secretagogue ipamorelin. Sold as a single 12mg lyophilized vial.
Investigational oral triple monoamine (serotonin-noradrenaline-dopamine) reuptake inhibitor that suppresses appetite and increases satiety. Phase 2 data showed roughly 10% body-weight loss over 24 weeks; not FDA-approved.
KEDG tetrapeptide testicular bioregulator. Stimulates hypothalamus-pituitary axis to promote LH and FSH secretion, supporting natural testosterone production.
Long-acting testosterone ester for hormone replacement therapy. Most common TRT medication in the US.
Long-acting testosterone ester similar to cypionate. Common TRT medication outside the US.
Transdermal 1.62% testosterone gel applied once daily to the shoulders/upper arms for continuous 24-hour absorption. A needle-free TRT option titrated against morning serum testosterone. Avoid skin transfer to women and children.
Short-acting testosterone ester for hormone replacement. Its rapid release and ~2-day half-life require more frequent injections than cypionate or enanthate, but produce very stable levels with daily or every-other-day dosing.
Ultra-long-acting injectable testosterone ester (Aveed in US, Nebido in EU). After a loading dose it is dosed every 10 weeks, the longest-interval injectable TRT. Requires in-office administration due to a pulmonary oil microembolism warning.
Natural peptide bioregulator derived from thymus gland. Restores immune function and has shown significant anti-aging effects in long-term clinical studies, including reduced mortality in elderly patients.
EW dipeptide thymic immunomodulator. Stimulates T-lymphocyte proliferation and differentiation, normalizing T-helper/T-suppressor ratio for immune balance.
Immune-modulating peptide naturally produced by the thymus gland. Enhances T-cell function and immune surveillance. Used clinically for hepatitis and immune deficiency.
Full-length thymosin beta-4 protein. Promotes tissue repair, reduces inflammation, and supports cardiovascular health. TB-500 is a synthetic fragment of this peptide.
Zinc-dependent nonapeptide thymic hormone (Facteur Thymique Serique). Requires 1:1 zinc binding for biological activity. Induces T-cell differentiation intra and extra-thymically.
Dual GIP/GLP-1 receptor agonist in pre-filled pen form. Brand names include Mounjaro, Zepbound. For weight management and type 2 diabetes.
Dual GIP/GLP-1 receptor agonist in lyophilized vial form from compounding pharmacies. Requires reconstitution with bacteriostatic water.
High-potency metabolic blend combining the GIP/GLP-1 dual agonist tirzepatide with the triple GIP/GLP-1/glucagon agonist retatrutide. Investigational only; no human trials of the combination. Sold as a single co-lyophilized vial.
Three-peptide high-dose healing blend combining TB-500 (25mg), BPC-157 (10mg), and KPV (10mg). Advanced tissue repair and anti-inflammatory protocol. Sold as a single 45mg pre-mixed vial.
A gut-derived postbiotic that induces mitophagy, the recycling of damaged mitochondria. Human RCTs (250-1000mg/day) show improvements in muscle strength, endurance, and mitochondrial gene expression. A supplement, not a peptide.
An oral Khavinson peptide bioregulator (peptide complex A-3) targeting blood vessels and vascular tissue. Taken in capsule courses to support cardiovascular and blood-vessel health.
ED dipeptide bioregulator for bladder and urinary tract health. Supports urothelial regeneration and smooth muscle tone in bladder tissue.
KED tripeptide vascular bioregulator. Supports endothelial health and vascular function. Studied for cardiovascular aging and vascular integrity.
KE dipeptide thymic bioregulator. Reverses age-related chromatin condensation, increases IL-2 production, and promotes T-cell differentiation.
Vasoactive intestinal peptide with anti-inflammatory and immunoregulatory properties. Used for chronic inflammatory conditions, mold illness, and respiratory support.
An oral Khavinson peptide bioregulator (peptide complex A-6) targeting the thymus gland — the oral-capsule analog to the injectable Thymalin/Thymogen lineage. Taken in capsule courses to support immune-system regulation.