Between keeping up with classes, work and applying for summer internships, eating a healthy meal is probably the last thing on your mind. But eating healthily can be easy – and when you do – it gives your body the vitamin boost it needs to grow and function properly.

The 13 different types of vitamins are essential to maintain health. Luckily, most of them are found in your daily diet already — the key is to eat fresh foods. For the busy-body student who is always on the go, take a multivitamin if it is difficult to maintain a balanced diet. Compare your eating habits with this quick guide to vitamins.

Vitamin A helps keep healthy skin, bones and teeth. It can be found in dark, leafy veggies, egg yolks and fish.

Vitamin B1 or thiamine, helps cells change carbs to into energy. These vitamins are found in eggs, nuts, seeds, whole grains and lean meats.

Vitamin B2 or riboflavin, is essential for the production of red blood cells. Riboflavin is present in dairy products, green leafy veggies, lean meats and milk.

Vitamin B3 also known as niacin, also helps in converting food into energy. It works in the digestive system and helps nerve function. Vitamin B3 can be found in dairy products, fish, nuts and poultry.

Vitamin B5 or pantothenic acid, boosts metabolism. It can be found in avocado, green veggies, eggs, milk, potatoes and whole grains.

Vitamin B9 also referred to as folic acid, helps with cell growth. They are found in dark leafy greens, beans and citrus fruits.

Vitamin B12 is important for metabolism. It also contributes to the formation of red blood cells and works to keep the central nervous system in tip-top shape. These vitamins are found in eggs, meat, milk products and poultry.

All B vitamins work together to accomplish these tasks, which is why eating a balanced diet is so important because without one another, optimization is not achieved.

Vitamin C is an antioxidant that helps in the healing process. It creates healthy tissue and is found in almost all fruits. It can also help fight off colds.

Vitamin D works helps the body absorb calcium, which is essential for strong bones. Vitamin D is hard to find in foods, but is present in some dairy products and fatty fish. Our body also produces small amounts of vitamin D when we are exposed to the sun, however, that does not mean the longer you are in the sun, the more vitamin D you get. Our body only makes so much of it.

Vitamin E is another antioxidant that helps our immune system fight bacteria. It also works with vitamin K to keep red blood cells from clotting. This vitamin can be found in green leafy vegetables, seeds, nuts and vegetable oils.

Vitamin K ensures that blood clots when it needs to. Green leafy vegetables, fish, liver, lean meats and broccoli all contain vitamin K.

Vitamins A, E, D and K are fat soluble vitamins, meaning our bodies store them when consumed and use them as needed. The rest of the essential vitamins, vitamin C and the B vitamins are water soluble, meaning they need to be replenished every day because our body does not naturally store them.

As always, everything is better in moderation. Too much of a certain vitamin can cause problems just as vitamin deficiencies can.

Source: Food and Drug Administration and the American Accreditation HealthCare Commission