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A variety of human hair colors; from top left, clockwise: black, brown, blonde, white, red. Human hair color is the pigmentation of human hair follicles and shafts due to two types of melanin: eumelanin and pheomelanin. Generally, the more melanin present, the darker the hair. Its tone depends on the ratio of black or brown eumelanin to yellow ...
A woman with dyed pink hair. Hair coloring, or hair dyeing, is the practice of changing the color of the hair on humans' heads.The main reasons for this are cosmetic: to cover gray or white hair, to alter hair to create a specific look, to change a color to suit preference or to restore the original hair color after it has been discolored by hairdressing processes or sun bleaching.
Hair removal. Anterior view of major and minor (lighter color) body hair growth areas in anatomically typical females and males. Hair removal, also known as epilation or depilation, is the deliberate removal of body hair or head hair . Hair typically grows all over the human body and can vary in thickness and length across human populations.
D5 is generally considered safe to use. But if you’re concerned, Jung stresses the importance of having proper ventilation when using everyday hair products that may contain D5. “Wherever you ...
Acute radiation syndrome (ARS), also known as radiation sickness or radiation poisoning, is a collection of health effects that are caused by being exposed to high amounts of ionizing radiation in a short period of time. [1] Symptoms can start within an hour of exposure, and can last for several months.
Human skin color. Human skin color ranges from the darkest brown to the lightest hues. Differences in skin color among individuals is caused by variation in pigmentation, which is the result of genetics (inherited from one's biological parents ), exposure to the sun, disorders, or some combination thereof.
The researchers found that the high genetic risk group had a 14.7-fold risk reduction in incidences of early-onset coronary artery disease, a 2.5-fold risk reduction in early-onset ischemic stroke ...
Intense pulsed light ( IPL) is a technology used by cosmetic and medical practitioners to perform various skin treatments for aesthetic and therapeutic purposes, including hair removal, photorejuvenation (e.g. the treatment of skin pigmentation, sun damage, and thread veins) as well as to alleviate dermatologic diseases such as acne. [ 1][ 2 ...