The Japanese manufacturer has found that its "TPNa(TM)" water-soluble vitamin E derivative, which it sells as an ingredient for cosmetics, is successful in improving dark circles around the eyes.
Sodium dl-alpha-tocopheryl phosphate (TPNa) is a water-soluble vitamin E derivative that contains a unique chemical structure, developed by SDK.
Approved by the Ministry of Health, the water-soluble TPNa shows anti-inflammatory and moisture-retention effects when used as an ingredient in cosmetics.
Dark circles around the eyes are a common cosmetics and beauty concern that consumers seek help with. Typically dark circles can be categorised into three types:
- blue circles caused by low microcirculation
- brown circles caused by accumulated blood-origin pigments
- black circles caused by slackening or the depression of skin
In general, dark circles around the eyes are believed to be the result of a combination of all three types. Therefore, traditionally, cosmetics companies have developed products for dark-circle care that have mainly been created as mixtures of ingredients and therefore effective for each type of dark circles.
The TPNa Vitamin E derivative improves the circulation of the blood and metabolism. It is a single ingredient that has an increasing effect on enzymes that take part in the breakdown and removal of pigments that cause brown circles.
In a clinical test that lasted four weeks, TPNa was found to improve the L* parameters (numerical values indicating luminosities of skin colors) of the surfaces of lower eyelids in 82% of those examined.
After discovering the effectiveness of the vitamin E derivative, the company will now send shipments of TPNa as an ingredient for eye-care cosmetics.