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the five main elements that make up the chemical composition of human hair are carbon, oxygen, hydrogen, and
nitroge and sulfue
which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones
the measurement of individual hair strands on 1 square inch (2.5 square centimeters) of the scalp is
compared to hair with high porosity, chemical services performed on the hair with low porosity require
more alkaline solutions
the naturally occuring fungus that causes the symptoms of dandruff when it grows out of control is
a highly contagious skin disease caused by a parasite called a mite that burrows under the skin is
the long, coarse, pigment hair found on the scalp, legs, arms, and bodies of males and females is called
an autoimmune disorder that causes affected hair follicles to be mistakenly attacked by a person's own immune system is
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