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The Importance of Calcium
鈣的重要性
Calcium is a mineral that helps build strong bones and teeth and regulates muscle contraction.
鈣是一種物質，有助于堅固骨骼和牙齒，并調節肌肉收縮。
Milk and dairy products have long been held as an important source of calcium.
牛奶和其他乳制品是鈣的主要來源。
In addition to calcium, Vitamin D is important because it helps the body absorb and retain calcium in the bones, making them strong.
此外，維生素D也很重要，其主要的功能是幫助人體吸收鈣質，不讓鈣質從骨骼中流失。
Similarly, sufficient exercise is now seen as another vital factor in maintaining healthy bone structure and density.
同樣，足夠的運動也被視為另一個保持健康骨骼和骨密度的重要因素。
Concerns have been voiced that a lack of exercise in growing children will have a detrimental effect on their bones.
也有擔憂表示成長中的兒童缺乏鍛煉將對骨骼造成不利影響。
Calcium can continue strengthening your bones until the age of 20 to 25 when peak bone mass is reached.
在20-25歲之前，補充鈣質可以促進骨骼的發育。
After this point, your bones can only maintain or lose their density and grow weaker as a natural part of the ageing process.
在這一點上,你的骨骼只能維持或失去骨密度而且隨著自然老化過程生越來越脆弱。
Inadequate dietary calcium intake before this age can increase the risk of brittle bone disease,as calcium is drawn from the bones as a reserve.
否則，隨著年齡的增長，骨骼會變得越來越脆弱，并引發各種骨骼疾病。
