1. 維生素D不僅能促進鈣的吸收、骨骼的保養,還能激活免疫系統、抑制細胞擴散、刺激細胞分化。
2. No standard answer.
3. The current study shows that an intake of up to 800 IU a day is safe.
4. False!You can find the correct answer in the first paragraph. Not "more", but "less".
Text: "Overall, researchers found, people who took daily vitamin D supplements were 7% less likely to die during the study — from any cause — than people who didn‘t."
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n. 鈣