Side-by-Side Comparison · 2026

Dermcidin vs Polymyxin B

Dermcidin vs Polymyxin B — mechanism, half-life, dosing, and research status compared. Which is right for your protocol?

Dermcidin
Antimicrobial Peptide

Dermcidin is a constitutively expressed antimicrobial peptide produced by eccrine sweat glands of human skin. It is secreted as a precursor and processed in sweat to yield active peptides that protect the skin surface from bacterial colonization....

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Polymyxin B
Antimicrobial Peptide

Polymyxin B is a cyclic lipopeptide antibiotic from Bacillus polymyxa that was approved in the 1960s and fell out of favor due to nephrotoxicity, but has experienced a major clinical resurgence as a last-resort treatment for carbapenem-resistant Gram-negative infections (Acinetob...

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Key Parameters
Parameter Dermcidin Polymyxin B
Category Antimicrobial Peptide Antimicrobial Peptide
Research Preclinical FDA Approved
Half-Life Hours (sweat) 6-8 hours
Typical Dose N/A (endogenous) 15,000-25,000 units/kg/day IV
Frequency Constitutive Every 12 hours IV
Route Endogenous (sweat glands) IV / IM / Topical / Intrathecal
FDA Status Not approved Approved (systemic Gram-negative infections)

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Frequently Asked Questions
What is the difference between Dermcidin and Polymyxin B?
Dermcidin: Dermcidin is a constitutively expressed antimicrobial peptide produced by eccrine sweat glands of human skin. It is secreted as a precursor and processed in sweat to yield active peptides that protect... Polymyxin B: Polymyxin B is a cyclic lipopeptide antibiotic from Bacillus polymyxa that was approved in the 1960s and fell out of favor due to nephrotoxicity, but has experienced a major clinical resurgence as a l...
Which has a longer half-life, Dermcidin or Polymyxin B?
Dermcidin half-life: Hours (sweat). Polymyxin B half-life: 6-8 hours.
Can you stack Dermcidin and Polymyxin B?
Dermcidin and Polymyxin B are in the same category and used together in research protocols. Always consult relevant literature and follow appropriate guidelines.

For research use only. Not medical advice. ASCEND does not conduct or endorse any specific research protocol. Always consult relevant scientific literature and regulatory guidelines.