Smoking is especially bad for people with dark skin because melanin hangs onto nicotine. Stronger addiction means it’s harder for those who are darker-skinned to kick the habit. In fact, white smokers are 15% better at quitting than blacks even though they smoke more cigarettes a day.
During the Renaissance period, an ideal beauty meant a white face with reddened lips and cheeks. But as a pure white complexion is impossible for a healthy person to attain naturally, women then used creams and other methods to whiten their skin.
Rice powder contains para aminobenzoic acid, ferulic acid and allantoin. When applied as a paste on the skin, rice powder has been shown to inhibit tyrosinase (responsible for starting melanin production).
While human skin comes in a range of hues, according to a Live Science article, this was a relatively recent evolutionary development, occurring alongside the migration of modern humans out of Africa between 100,000 and 50,000 years ago.