Collocations for vitamin - noun

essential, important
antioxidant, fat-soluble
prenatal (AmE)
multiple (AmE)
vitamin A, vitamin B, etc.
vitamin D pills

take
The doctor told me to take vitamins regularly.

contain
Most foods contain vitamin E.

provide
Potatoes provide vitamins A and C, as well as calcium.

be rich in
Fish is rich in vitamins and minerals.

enrich sth with, fortify sth with
breakfast cereals fortified with vitamins

get
Some people are getting too much vitamin A.

add

be found in sth

pills, supplements, tablets (esp. BrE)
deficiency
Vitamin C deficiency can ultimately lead to scurvy.

supplementation
content
strawberries' high vitamin C content

requirement
your daily vitamin C requirement

intake
therapy, treatment
level

vitamins and minerals