Shampoos and conditioners are marketed as being formulated to keep hair healthy, shiny and free of dandruff and tangles. Despite this, many shampoos on the market contain ingredients that may actually damage hair and irritate the scalp. In extreme cases, some of these ingredients may even cause or exacerbate hair loss.
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Inherited traits from parents aren’t just passed out in random fashion. Inherited traits are passed through the genes of parents to their children. Some traits are passed on only through the mother or only through the father.
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Muscle pain can be caused by starting a new exercise, pregnancy or by simply going about your daily activities. Pain in the upper leg or buttocks often results from muscle pain in the hamstring or glute muscles.
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Most people have some experience with acne. Some suffer from only an occasional blemish or breakout. Others suffer from chronic acne with varying severity. At the first sign of acne, many people purchase over-the-counter, or OTC, products containing salicylic acid or benzoyl peroxide.
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Acne varies greatly in severity. Most cases are mild to moderate. However, some people suffer from very severe acne, also known as cystic acne. Over-the-counter products may effectively treat more mild cases of acne, but severe or cystic acne may require treatment by a dermatologist.
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The developmental biologist Jean Piaget named four stages of cognitive development. The first two stages, also known as the sensorimotor stage and preoperational stage, span the ages of birth to 7 years. Each stage contains certain cognitive milestones that mark early childhood cognitive development.
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