What is the difference between KPV and Thymalin?

KPV: KPV (Lys-Pro-Val) is the C-terminal tripeptide of alpha-melanocyte-stimulating hormone (alpha-MSH residues 11-13), the smallest alpha-MSH fragment retaining anti-inflammatory activity. Research-only; ... Thymalin: Thymalin is a heterogeneous polypeptide extract from calf thymus (a mixture, not a single defined peptide) developed in the 1970s by V. Kh. Khavinson and V. G. Morozov at the Military Medical Academy ...

What does the research say about KPV vs Thymalin?

KPV: Dalmasso et al. (Gastroenterology 2008; PMID 18061177) demonstrated PepT1-mediated uptake of KPV and reduction of DSS- and TNBS-induced colitis in mice. Kannengiesser et al. (Inflammatory Bowel Diseases 2008; PMID 18092346) showed anti-inflammatory effects in two murine colitis models at least partly independent of MC1R signaling. Brzoska et al. (E… Thymalin: Evidence base is almost entirely single-lab (Khavinson/Morozov, St. Petersburg). Long-term observational work in elderly Russian cohorts reported reduced all-cause mortality and lower incidence of respiratory infections with Thymalin (alone or with Epithalamin) over 6–8 years, but these were not blinded Western RCTs and have not been independently…

KPV vs Thymalin

Q: Can you stack KPV and Thymalin?

KPV (immune) and Thymalin (immune) are in the same category and may have overlapping mechanisms — researchers should review both profiles carefully before combining. Consult a licensed provider before combining any compounds.

Head-to-head comparison of KPV and Thymalin — mechanism, dosing, side effects, legal status, and pricing.

KPV

KPV (Lys-Pro-Val) is the C-terminal tripeptide of alpha-melanocyte-stimulating hormone (alpha-MSH residues 11-13), the smallest alpha-MSH fragment retaining anti-inflammatory activity. Research-only; not FDA-approved. Evidence is primarily preclinical with no controlled human trials.

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Thymalin

Thymalin is a heterogeneous polypeptide extract from calf thymus (a mixture, not a single defined peptide) developed in the 1970s by V. Kh. Khavinson and V. G. Morozov at the Military Medical Academy / St. Petersburg Institute of Bioregulation and Gerontology. Registered as a pharmaceutical in the USSR/Russia for immunocorrection. Distinct from Thymulin (Bach's zinc-dependent nonapeptide pGlu-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn, originally called FTS) and from Thymosin alpha-1 (a 28-amino-acid synthetic peptide). Not FDA-approved in the US; research-use only.

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KPV

Thymalin

Where Researchers Are Buying

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KPV

Best $/mg

$2.10/mg

Peptide Supply Co.B

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Thymalin

Best $/mg

$2.16/mg

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Lab Verification

COA corpus from Disclosed Labs — independently tested batches only.

KPV

COAs

99.5%

Avg purity

Labs

Full testing data

Thymalin

COAs

99.5%

Avg purity

Labs

Full testing data

KPV Research Summary

Dalmasso et al. (Gastroenterology 2008; PMID 18061177) demonstrated PepT1-mediated uptake of KPV and reduction of DSS- and TNBS-induced colitis in mice. Kannengiesser et al. (Inflammatory Bowel Diseases 2008; PMID 18092346) showed anti-inflammatory effects in two murine colitis models at least partly independent of MC1R signaling. Brzoska et al. (Endocrine Reviews 2008; PMID 18612139) reviewed alpha-MSH and related tripeptides, summarizing NF-kB suppression across cell types. Subsequent preclinical work (largely from the Merlin group at Georgia State) has explored oral nanoparticle and polysaccharide-hydrogel delivery for IBD. No controlled human trials have been published.

Key references

Thymalin Research Summary

Evidence base is almost entirely single-lab (Khavinson/Morozov, St. Petersburg). Long-term observational work in elderly Russian cohorts reported reduced all-cause mortality and lower incidence of respiratory infections with Thymalin (alone or with Epithalamin) over 6–8 years, but these were not blinded Western RCTs and have not been independently reproduced. No FDA-registered clinical trials.

Key references

Can you stack KPV and Thymalin?

KPV and Thymalin are both in the Immune category and may have overlapping mechanisms. Researchers should review both profiles carefully, understand the mechanisms of action, and monitor the relevant biomarkers when combining compounds in the same class. As always, consult a licensed healthcare provider before making any decisions about combining research compounds.

Other comparisons

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This platform provides informational tools only, not medical advice. This comparison is for educational purposes only. Consult a licensed provider.