SilkyGel

SilkyGel is a natural ingredient from fermentation using Bacillus subtilis(natto), its main component is γ-PGA, which is a multifunctional ingredient.

SilkyGel is a natural ingredient from fermentation using Bacillus subtilis(natto), its main component is γ-PGA, which is a multifunctional ingredient that listed in below: Absorb and preserve moisture Cooperate with hyaluronic acid(HA) in moisture preservation Increase the level of NMFs in skin Maintain the structure integrity of skin Decrease the TEWL level Alleviate the inflammation and allergy The difference between SilkyGel and other γ-PGA products is its unique high degree of polymerization and extraordinary smooth feeling. SilkyGel can improve your product’s customer experience.

Sensory Evaluation

The skin feeling of SilkyGel and Hyaluronic acid (HA) in different concentration of water solution was test by 20 volunteers. The score range was from 0 to 4: 0 means no smooth feeling, 4 means strong smooth feeling. The result showed that the water solution of 0.1% SilkyGel has sensible smoothing feeling, but HA doesn’t. The degree of smoothing feeling keep pace with concentration, and the score of SilkyGel is better than HA (Figure 1). In high concentration (0.4%), SilkyGel keep its smooth feeling but HA has a conglutinative feeling.

Figure 1. Smooth feeling of SilkyGel and HA


In-vitro studies of moisturizing ability

We compared the moisturizing ability of SilkyGel, γ-PGA (from market), and HA in different relative humidity. In 81% relative humidity, γ-PGA showed the best hygroscopicity and moisture retention, the performance of SilkyGel is worse than γ-PGA but better than HA. In 32% relative humidity, SilkyGel performs the best (Figure 2).

Figure 2. Hygroscopicity and moisture retention in different relative humidity


In-vivo studies

Short-term Test
The study on hydration degree of skin was tested for 15 volunteers in a room with 25℃, RH 45% environment. The concentration of SilkyGel, γ-PGA, and HA were 0.4% in cream. Blank cream was free of active ingredient. Four creams were spread on different areas of volunteer’s arm, and untreated area was as control. The change of degree of hydration of different skin areas in 8 hours was measured by MPA-580 system.
The result was shown in Figure 3.

Figure 3. Percentage change of degree of skin hydration in 8 hours


Long-term Test

The concentration of SilkyGel, γ-PGA, and HA were 0.2% in cream, blank cream was free of active ingredient. Every cream was applied for 10 volunteers for 2 weeks, used twice daily. The degree of hydration, TEWL, and elasticity of face skin were measured using MPA-580 system at 0, 1 and 2 weeks.
The result was shown in Figure 4 to Figure 6.

Figure 4. Percentage improvement in degree of hydration


Figure 5. Percentage reduction in TEWL



Figure 6. Percentage improvement in skin elasticity


Conclusion

SilkyGel performs the best although it doesn’t make a significant difference with HA and γ-PGA in some test items.

Criteria

AppearanceOff-white solid powser
pH (1% water solution)6.0 ~ 8.0
Total nitrogen content (%)3.8 ~ 5.0 (Kjeldahl method)
Loss on drying (%)≤ 10 %
Total of bacterium (CFU/g)≤ 500
Hg (ppm) ≤ 1
As (as As2O3, ppm)≤ 10
Pb (ppm)≤ 40

Storage

Sealed, Guard against damp, room temperature.

Suggested usage

0.2% ~ 2.0%

Recommendation of use

• SilkyGel is freely water-solvable in mixing, and we recommend dispersing it in  propanediol before dissolved in water.
• SilkyGel‘s viscosity is sensitive to high temperature, it should be mixed in recipe below  60℃.
• SilkyGel is sensitive to acid, and it shouldn’t be used in pH below 5.5.

Contact us


www.onlystar.com
Email: market@onlystar.com
huangzhengmei@onlystar.com
liuyuan_sale@onlystar.com



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