Prevention of kidney stones may include a combination of lifestyle changes and medications. Lifestyle changes. You may reduce your risk of kidney stones if you: Drink water throughout the day. For people with a history of kidney stones, doctors usually recommend passing about 2.6 quarts (2.5 liters) of urine a day.
Melanin is the pigment that gives your skin its color, and it is produced in specialized skin cells called melanocytes. The darker your skin is, the more melanin these cells produce. They can be found deep in the epidermis, close to the basement membrane.
Cells involved in skin cancer. Skin cancer begins in your skin's top layer â the epidermis. The epidermis is a thin layer that provides a protective cover of skin cells that your body continually sheds.The epidermis contains three main types of cells: 1  Squamous cells lie just below the outer surface and function as the skin's inner lining. Basal cells, which produce new skin cells, sit beneath the squamous cells. 2  Melanocytes â which produce melanin, the pigment that gives skin its normal color â are located in the lower part of your epidermis. 3  Melanocytes produce more melanin when you're in the sun to help protect the deeper layers of your skin.