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BIOTINOYL TETRAPEPTIDE-51.

Valuable / SKIN CONDITIONING

A cutting-edge cell-communicating peptide that targets the skin's internal 'recycling' system to enhance protein quality and structural integrity. By combining biotin with a specialized tetrapeptide sequence, it facilitates cellular detoxification while simultaneously boosting essential dermal proteins.

Cell-communicating ingredient Autophagy inducer Skin conditioning Collagen booster Hair conditioning

Science

Operates as a potent autophagy inducer, stimulating the expression of LC3 and ATG proteins to clear accumulated cellular damage and oxidized proteins. Additionally, it acts on the genetic level to upregulate COL1A1 mRNA expression, promoting collagen synthesis, and modulates growth factors like VEGF and KGF to support follicle and barrier health.


Research

High confidence
Effective range 0.05–1%
Optimal

1%

Key findings

  1. 01 In vitro testing demonstrated a 38.44% increase in COL1A1 collagen gene expression at a 0.05% concentration.
  2. 02 A 1% clinical evaluation of the X50 Autophagy system confirmed measurable improvements in skin radiance, elasticity, and a visible reduction in wrinkle depth.

Transparency

Commonly dusted
Min. effective
0.1%
Red flag below
0.01%

Due to its high efficacy at low concentrations and high cost, it is frequently used at trace levels (under 0.05%) for marketing purposes. To achieve the 38% collagen gene upregulation seen in studies, a minimum of 0.05% is required, while 1% is the benchmark for clinical wrinkle reduction.


The Formula

Solubility
Water
Optimal pH 6 – 7.5
0 7 14

Stability

Demonstrates excellent stability in aqueous hydrogels and phospholipid ethosomes, remaining stable at 45°C for 30 days. It requires a near-neutral pH environment to maintain peptide bond integrity.

Synergies

  • Encapsulated delivery systems (Ethosomes)
  • Hyaluronic acid
  • Niacinamide

Conflicts

  • Proteolytic enzymes
  • Strong oxidizing agents
  • pH levels below 4.0 or above 9.0

Safety

CIR Status
Not reviewed
Max tested
10%
Sensitization risk Low

Considered non-irritating and safe for cosmetic application, showing high compatibility even when delivered through high-penetration vesicle systems.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Valuable

A sophisticated ingredient for precision aging prevention that effectively bridges the gap between cellular detoxification and structural rebuilding.


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References