Peptide Comparison
CrystagenvsPalmitoyl Pentapeptide-4 (Matrixyl)
Immunogeroprotective tripeptide bioregulator (Glu-Asp-Pro) that optimally stimulates thymic epithelial cell proliferation at 200 ng/mL, suppresses thymocyte apoptosis through p53 downregulation and Ki-67 upregulation, and contributed to a 4.1-fold mortality reduction in a 266-person 6-8 year clinical study when combined with complementary pineal peptides
Collagen-boosting signal peptide clinically proven to reduce wrinkles and fine lines in photoaged skin.
At a Glance
Quick
comparison
Dose Range
Crystagen
1–100 mcg/kg
Palmitoyl Pentapeptide-4 (Matrixyl)
3 ppm–100 ppm mg
Frequency
Crystagen
Once daily
Palmitoyl Pentapeptide-4 (Matrixyl)
Once daily
Administration
Crystagen
Subcutaneous injection
Palmitoyl Pentapeptide-4 (Matrixyl)
Topical
Cycle Length
Crystagen
8-12 weeks
Palmitoyl Pentapeptide-4 (Matrixyl)
Ongoing/indefinite
Onset Speed
Crystagen
Gradual (3-4 weeks)
Palmitoyl Pentapeptide-4 (Matrixyl)
Moderate (1-2 weeks)
Evidence Level
Crystagen
Limited human trials
Palmitoyl Pentapeptide-4 (Matrixyl)
Limited human trials
Efficacy
Benefit
ratings
Immune Rejuvenation
Healthy Aging
Cancer Defense
Anti-Wrinkle
Collagen Production
Skin Rejuvenation
Technical Data
Compound
specifications
Crystagen
Molecular Formula
C14H21N3O8
Molecular Weight
359.3 g/mol
Half-Life
Short plasma half-life typical of tripeptides (minutes); biological effects persist for weeks to months through gene expression modifications and thymic microenvironment restoration; metabolized to constituent amino acids
Bioavailability
Absorbed via intestinal peptide transporters (PepT1/POT and LAT carrier families) when administered orally; rapid absorption from subcutaneous injection sites; efficient cellular uptake due to ultra-short tripeptide structure
CAS Number
Not assigned (patented as immunogeroprotective peptide, US8057810B2)
Palmitoyl Pentapeptide-4 (Matrixyl)
Molecular Formula
C39H75N7O10
Molecular Weight
802.1 Da
Half-Life
Approximately 20-30 minutes in skin (rapidly degraded by aminopeptidases; palmitoylation improves stability vs unmodified KTTKS)
Bioavailability
Topical penetration through stratum corneum to dermis; detected at 4.2 µg/cm² in SC, 2.8 µg/cm² in epidermis, 0.3 µg/cm² in dermis
CAS Number
214047-00-4
Protocols
Dosing
tiers
Crystagen
Palmitoyl Pentapeptide-4 (Matrixyl)
Applications
Best
suited for
Crystagen
Restoring thymic function and immune competence in aging individuals with immune senescence
Crystagen is particularly well-suited for individuals focused on restoring thymic function and immune competence in aging individuals with immune senescence. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Comprehensive Khavinson bioregulator protocols for immune and anti-aging support
Crystagen is particularly well-suited for individuals focused on comprehensive khavinson bioregulator protocols for immune and anti-aging support. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Supporting immune function during and after illness recovery
Crystagen is particularly well-suited for individuals focused on supporting immune function during and after illness recovery. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Geroprotective immunomodulation to extend healthspan and reduce age-related disease incidence
Crystagen is particularly well-suited for individuals focused on geroprotective immunomodulation to extend healthspan and reduce age-related disease incidence. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Palmitoyl Pentapeptide-4 (Matrixyl)
Individuals seeking non-invasive anti-wrinkle treatment
Palmitoyl Pentapeptide-4 (Matrixyl) is particularly well-suited for individuals focused on individuals seeking non-invasive anti-wrinkle treatment. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Those with photoaged skin showing fine lines and loss of firmness
Palmitoyl Pentapeptide-4 (Matrixyl) is particularly well-suited for individuals focused on those with photoaged skin showing fine lines and loss of firmness. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
People looking to boost collagen production through topical skincare
Palmitoyl Pentapeptide-4 (Matrixyl) is particularly well-suited for individuals focused on people looking to boost collagen production through topical skincare. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Sensitive skin types seeking well-tolerated anti-aging actives
Palmitoyl Pentapeptide-4 (Matrixyl) is particularly well-suited for individuals focused on sensitive skin types seeking well-tolerated anti-aging actives. Research and clinical experience suggest meaningful benefits in this area when used as part of a comprehensive treatment approach.
Safety Profile
Side
effects
Crystagen
Common
- Injection site reaction
- Mild fatigue
- Mild headache
- Minor digestive changes
Uncommon
- Flu-like symptoms
Serious
- No documented serious adverse effects
Palmitoyl Pentapeptide-4 (Matrixyl)
Common
- Mild Tingling
- Transient Redness
- Dryness with Exfoliants
- Mild Irritation
Uncommon
- Contact Dermatitis
Serious
- Excessive Collagen Synthesis and Scar Risk
Research Status
Safety
& evidence
Crystagen
Evidence Level
Limited human trials
FDA Status
Research compound
Safety Overview
Crystagen is a crystalline protein extract (likely containing collagen-derived peptides) from animal tissues that is not FDA-approved and has essentially no published safety data in medical literature. As an undefined and poorly characterized biological mixture, batch consistency, sterility, and identity cannot be verified. Potential risks include allergic reactions to animal proteins, contamination from source tissues, and unknown immunological effects. No formal safety assessments, animal studies, toxicology screening, or human clinical trials exist. The product appears to exist primarily in Russian medical markets, and little information about its actual composition or manufacturing is publicly available.
Contraindications
- xKnown hypersensitivity to peptide bioregulators or constituent amino acids (glutamic acid, aspartic acid, proline)
- xPregnancy and breastfeeding — insufficient reproductive safety data
- xActive autoimmune disease in flare without physician supervision
- xOrgan transplant recipients on immunosuppression — potential interference with immunosuppressive regimens
Palmitoyl Pentapeptide-4 (Matrixyl)
Evidence Level
Limited human trials
FDA Status
Research compound
Safety Overview
Palmitoyl pentapeptide-4 (Matrixyl) demonstrates excellent dermatological safety with GRAS/safe-for-cosmetic status; extensively used in anti-aging skincare for 20+ years with no serious adverse events. Skin irritation potential is minimal at recommended 2-3% concentrations (irritation index <0.5). No systemic absorption via intact skin; confined to epidermis/dermis per Franz diffusion cell studies. Stability in formulations verified through HPLC analysis.
Contraindications
- xKnown hypersensitivity to palmitoyl pentapeptide-4 or formulation excipients
- xActive skin infections at the application site
- xSeverely compromised skin barrier with open wounds
- xNo known systemic contraindications at cosmetic concentrations
Decision Guide
Which is
right for you?
Choose Crystagen if...
- Restoring thymic function and immune competence in aging individuals with immune senescence
- Comprehensive Khavinson bioregulator protocols for immune and anti-aging support
- Supporting immune function during and after illness recovery
- Geroprotective immunomodulation to extend healthspan and reduce age-related disease incidence
Choose Palmitoyl Pentapeptide-4 (Matrixyl) if...
- Individuals seeking non-invasive anti-wrinkle treatment
- Those with photoaged skin showing fine lines and loss of firmness
- People looking to boost collagen production through topical skincare
- Sensitive skin types seeking well-tolerated anti-aging actives