Read the text and fill in the gaps with the right phrase. There is ONE EXTRA phrase you don’t need to use.

Among vitamins, D seems short for ‘Does a lot’
Vitamin D helps bones and muscles to grow strong and healthy. Bur more and more research is suggesting that ... many diseases.
The easiest way to get vitamin D is from sunlight. ... to produce vitamin D. But many people worry about skin damage from the sun. ... or wear sunblock or stay out of the sun.
Not many foods naturally contain vitamin D. Foods high in this vitamin include oily fish such as salmon and tuna, and fish liver oils. ... that farmed salmon had only about one-fourth as much vitamin D as wild salmon.
Small amounts of D are found in beef liver, cheese and eggs. Research in the last several years has shown that ... the risk of heart attacks and cancer. Other studies have shown that people with rheumatic diseases often have low levels of vitamin D.
More doctors are now testing their patients for their vitamin D levels. But ... , it might act as a poison.