Excess thyroid hormone can cause bone loss. In women, bone loss dramatically increases menopause due to decreased estrogen levels. Long-term menstrual loss (amenorrhea) before menopause also increases the risk of osteoporosis. In men, low testosterone levels can cause bone loss. Eating disorders and other conditions. Strong restrictions on food intake and weight loss can weaken the bones of both men and women. In addition, surgeries and weight loss conditions, such as celiac disease, can affect your body's ability to absorb calcium.

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