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Some women also reported excess hair growth, although none stopped using the hormone for this reason.
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Pubic hair growth, another early sign of puberty, started about a year after testes enlargement in all groups but still earlier than previously thought.
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For instance, men who get placebo in studies of drugs that cause baldness often have hair growth, just because even that waxes and wanes naturally.
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But it will cause dirt and oil to accumulate on your scalp and hair follicles, and could cause inflammation and irritation that might stunt hair growth.
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Latisse could potentially cause hair growth if it drips on the face or darken eye color, but eye-color changes weren't seen in Latisse clinical trials, Allergan says.
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Endocrine disorders like thyroid disease can cause irregular periods, too, as can polycystic ovary disease, a hormonal glitch that may lead to obesity, acne, and excessive hair growth.
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That observation is only useful, though, if you can multiply dermal papilla cells and do so in a way that allows them to keep their ability to induce hair growth.
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One day, says McDaniel, his GentleWaves device may even be shown to spur hair growth and, if it can be made to work in reverse, stall the growth of fat or cancer cells.
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Mexico has more free trade agreements in place than any other country, which could reap huge rewards if partners such as Germany, the US, possibly the UK, and even Japan, shed their hair shirts and finally go for growth this year.
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Using those numbers, its price-to-earnings-growth ratio is just a hair below 1.0.
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Although it is understandably tight-lipped about the exact mechanism behind its success, one probably enlists the help of cells called keratinocytes, which interact naturally with the dermal papilla cells of the hair follicle and secrete a chemical factor that supports their growth.
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