80.Restricted ingredients in cosmetic and skin care products

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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.
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18-.What kind of hairs do you have?

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The skin Adnexa
Hair
Nail
Sweat gland
sebaceous gland

What kind of hairs do you have?

Hair
The types of hairs
Lanugo hairs
Hairs are soft and thin. They only happened to the newborn baby. 
Vellus hairs
They are only 1-2cm height without melanin.
They don’t have sebaceous gland and won’t excrete lipid.
Terminal hairs
They are coarse and long hairs with glands. Especially on head, arm, and leg.    


Hair
Hairs have their life. They continue to grow, fall off, and new born. It can be defined to 3 periods. They are Anagen, Catagen, and Telogen. It falls off 70-120 hairs every day.

Dermal papilla
It is the recess of hair bulb. There are cells next to edge to get the nutrition from blood capillaries. The cell divisions will become new hairs. If cells are damaged, the hairs won’t grow any more.  

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79.The roles of Vitamin in skin

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