Final answer:
To increase vitamin D intake, patients should consume foods naturally rich in vitamin D like salmon and tuna, or fortified foods such as milk and cereals. Sunlight exposure can also help the body synthesize its own vitamin D.
Step-by-step explanation:
To help a patient increase their intake of vitamin D, a medical assistant should recommend foods that are rich in this essential nutrient. Fish such as salmon and tuna are naturally rich in vitamin D. Furthermore, in the United States, vitamin D is often added to other foods, making them fortified sources, such as milk, soy milk, and breakfast cereals. Teenagers are recommended to get 5 micrograms (200 International Units) of vitamin D every day. For example, a 3.5-ounce portion of cooked salmon provides 360 IU of vitamin D, while an 8-ounce glass of milk is fortified with about 100 IU of vitamin D.
For those who may not have sufficient exposure to sunlight or have higher needs, additional sources can include cod liver oil, fish liver oil, egg yolk, and animal liver. It is important to note that the body can also synthesize vitamin D when exposed to sunlight, so regular access to sunlight can reduce or negate the dietary requirement for this vitamin, depending on individual circumstances.