This document discusses various types of hyperpigmentation including age spots, freckles, melasma, and acne scars. It explains that hyperpigmentation is caused by an excess production of melanin by melanocytes in response to factors like sun exposure, hormones, inflammation, and genetics. The key points are that melanin provides skin protection but can lead to dark spots when overproduced. Various internal and external triggers influence melanin production and the resulting pigmentation depends on an individual's genetic susceptibility and melanocyte reactivity. Common characteristics and causes of different hyperpigmentation types like freckles and melasma are also outlined.
The document discusses the key elements of an Occupational Health and Safety Assessment Series (OHSAS) 18001 management system. It notes that OHSAS 18001 was originally developed in the early 1990s as British Standard 8800 and revised in 1999 to be more compatible with ISO 14001. The document then outlines the main components of an OHSAS 18001 system, including policy, planning, implementation, checking and corrective action, and management review.
This document discusses insoluble salts. It defines insoluble salts as salts that cannot dissolve in water at room temperature. It explains that insoluble salts can be prepared through precipitation reactions or double decomposition reactions by mixing aqueous solutions containing the cations and anions that will form the insoluble salt. This causes the ions to interchange and form an insoluble precipitate. Examples of insoluble salts formed and their ionic equations are also provided.
Flawless skin is everyone's dream. To achieve that we need to have basic understanding of the skin structure and our own skin type, then choose the right skin care product, and continuous using it for a period of time.
Having the right attitude in taking care of our skin is very important. Here we have the basic understanding of the skin structure, to briefly explain what is function of our skin.
Tsubaki is a hair care product that aims to make every woman feel beautiful both inside and out. It uses unique technology and natural ingredients like arginine and camellia oil to repair melanin holes in hair and protect hair from UV damage. This helps improve internal and external shine by allowing light to reflect evenly from within the hair shaft and providing a smooth, lustrous coating on the hair.