短语讲解：

1. It may also help to protect the body against diseases such as diabetes and cancer.

such as 诸如
例句：Context scenarios address questions such as the following:
情境场景剧本解决了以下的问题。

2. Taking care of someone who has dementia is extremely demanding.

take care of 照顾
例句：Good-bye. Take care of yourself.
多多保重，再见。

3. As a result, low levels of vitamin D are common among older people.

as a result 结果， 因此
例句：As a result of the collision, the first two cars telescoped.
由于相撞,头两节车厢叠嵌在一起了。