Compared with the fingerprint of algae-sourced astaxanthin oleoresin, the structures of its effective esterified components and effective free components after hydrolysis are completely consistent!

Esterified State Spectrum: 

Hydrolysis Spectrum:

Safety

The acute oral LD50 of VDK® Astaxanthin Oleoresin in ICR mice is >5000mg/kg. According to the acute toxicity classification, this product is non-toxic. Multiple biological experiments have proved that it is truly safe and reliable!

Low Exogenous Nucleic Acid Residue

Physical Properties

Pure, transparent, bright and vivid are the appearance characteristics of VDK® Astaxanthin Oleoresin, with no peculiar smell and excellent color!

The figure below shows VDK® Astaxanthin Oleoresin, which perfectly interprets these four core characteristics: 

VDK® Astaxanthin Oleoresin

• Pure

  VDK®Astaxanthin Oleoresin has no suspended impurities, precipitates or stratification, being pure and clean.

• Transparent

  Although VDK®Astaxanthin Oleoresin has a rich color, it still maintains a clear and transparent texture instead of turbidity. This “transparency” is a significant symbol of high-quality astaxanthin oil.

• Bright

  “Bright” refers to the luster and freshness presented by the oil. VDK® Astaxanthin Oleoresin has a smooth surface, reflecting bright luster, with full and vibrant overall color, like flowing ruby liquid. This bright appearance indicates the freshness and strong antioxidant activity of the astaxanthin component in it.

• Vivid

  This is a striking visual feature of VDK® Astaxanthin Oleoresin - a vivid, intense and unique red color, which intuitively shows its high concentration and natural source!

No Solid Foreign Substances

Content of Solid Foreign Substances

Take 80mg of VDK® Astaxanthin Oleoresin and a peer product (algae-sourced astaxanthin oleoresin), dissolve and dilute to 100ml with acetone.
Add 5ml, 10ml and 15ml of pasty chlorophyll solution (with a chlorophyll content of 0.012%) to the VDK® Astaxanthin Oleoresin solution respectively.

Appearance Comparison as Follows: 

Solution Filtration Comparison Experiment: 

Filter Paper Residue Comparison Chart: 

Compare the solid foreign substance residue on filter paper between VDK® Astaxanthin Oleoresin and a peer product (algae-sourced astaxanthin oleoresin): 

Strong Thermal Stability

Under nitrogen protection, VDK® Astaxanthin Oleoresin is heated in a 60°C water bath for 6 hours, showing good thermal stability with no content degradation.

Antioxidant Comparison

Directly exposed to air at room temperature.