80.Restricted ingredients in cosmetic and skin care products

-
Image
Restricted ingredients in cosmetic and skin care products by regulation. Ingredient Potential toxicity Hexachlorophene Neurotoxic effects Ability to penetrate human skin Mercury compounds Accumulation in the body Skin irritation Allergic reactions Neurotoxicity Bithionol Photocontact sensitization Halogenated salicylanilides Photocontact sensitization Chlorofluorocarbon propellants Hazardous to human health Chloroform Plausible carcinogenicity Vinyl chloride Plausible carcinogenicity Zirconium-containing complexes Lung toxicity Methylene chloride Plausible carcinogenicity help to find the specific skincare product ingredients by "skin+" App.
Post a Comment

36.Why do we get old? (2)

-

Why do we get old? (2)

Why do we get old?
Is there any method to slow down aging?
Why do human age? Some elders are still healthy, but some are weak and sick. The scientists do not come to the definitive conclusions yet. There are some aging theories as the following.

 The aging theories_part2
Error and repair
The damaged cells will continue to rebuild and repair again and again in the entire life. Therefore repaired DNA only can recover 90%. The unrepaired of DNA function composed a lot of proteins will accumulate and cause the error messages transfer. This is reason of dysfunction and illness in the body.

Caloric restriction
Dr. Roy Walford in UCLA proposes “caloric restriction” theory. After long term animal experiments, he found caloric restricted animals are younger, good health, and have a long life compared to the without restricted ones. He thinks the reason of experiments results is caloric restriction can decrease weight to reach the saturation point and optimize the metabolism. 

-----------------------------------------------------------------------------------------------
help to find the specific skincare product ingredients by "skin+" App










Comments

Post a Comment

Popular posts from this blog

80.Restricted ingredients in cosmetic and skin care products

-
Image
Restricted ingredients in cosmetic and skin care products by regulation. Ingredient Potential toxicity Hexachlorophene Neurotoxic effects Ability to penetrate human skin Mercury compounds Accumulation in the body Skin irritation Allergic reactions Neurotoxicity Bithionol Photocontact sensitization Halogenated salicylanilides Photocontact sensitization Chlorofluorocarbon propellants Hazardous to human health Chloroform Plausible carcinogenicity Vinyl chloride Plausible carcinogenicity Zirconium-containing complexes Lung toxicity Methylene chloride Plausible carcinogenicity help to find the specific skincare product ingredients by "skin+" App.
Read more

71.UVA and UVB Sun protection factor

-
Image
UVA andUVB Sun protection factor SPF is Sun Protection Factor. The number is determined experimentally indoors by exposing human subjects to a light spectrum meant to mimic noontime sun.   The SPF number only relates to UVB protection.  UVA is measured by the other definition.  UVA protection is not measured through SPF numbers.  PA is the Japanese measurement of sun protection. It is one of protection grade of UVA  . UVA is based on the Persistent Pigment Darkening (PPD) reaction reading at 2-4 hours of sun exposure.  PA is a protective level of strength to mark the three PA+, PA++ and PA+++. SPF(sun protection factor) Standard: ISO 2444: 2010 cosmetic sun protection test method in vivo determination of SPF (sun protection factor) Test by erythema Minimal dose: MED (minimal erythema dose) Process: exposure to the UV (wave length 290-400nm) Test skin type: type I~ III (ITA 0 >28 0 ) Duration: 16-24hrs after exposure UVA-PF (UVA protection factor)
Read more

79.The roles of Vitamin in skin

-
Image
The roles of Vitamin in skin As we know, the chemical changes induced by exposure to sunlight, we should be able to design a cosmeceutical regime to combat photodamage and reverse its effects. Vitamin molecules are the options and have the functions of metabolism, antioxidant and preventing free radical. 1.       Metabolism Vitamin A controls the conversion of pre–matrix metalloproteinases secreted by keratinocytes and fibroblasts into active matrix metalloproteinases, but with a deficiency of vitamin A, UV irradiation stimulates the unimpaired release of metalloproteinases that then destroy collagen and the anchoring fibrils. Without vitamin A, the rete pegs become flattened. Lang erhans cells need vitamin A to function, but if the vitamin A is inactivated by light, then they cannot function properly and recognize cells whose DNA has been damaged. 2.       Antioxidant Deficiencies of vitamin C permit more free radical damage . The main action of vitamin C is as an
Read more