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Added: Nov 01, 2008
The thyroid produces hormones which affect your body use of energy, and how fast the bodies metabolism works. It affects the rate of growth of the hair and bones, controls body weight temperature, and energy level. Hypothyroidism, an underactive thyroid causes thin hair, weight gain, fatigue, feeling cold and constipation. Hyperthyroidism, an overactive thyroid causes hair loss, weight loss, perspiration, and menstrual irregularities.
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