The phrase "certain vitamins" refers to specific types of nutrients that our bodies need. These vitamins help us stay healthy, have energy, and perform different functions in our bodies. Full definition
Your doctor can easily tell through blood tests and other diagnostic examinations whether or not your baby has enough of certain vitamins in his body. (newkidscenter.com)
Another common explanation for this behavior is a deficiency in certain vitamins, most commonly vitamin B. (caninejournal.com)
Animals who are on insulin must adhere to strict dietary regulations, as certain vitamins and foods may cause a dangerous reaction when consumed. (jupiterpet.com)