Why Does Your Body Need Vitamins?

Why does your body need vitamins?

Your body needs vitamins for normal growth, development, and everyday body functions.

Vitamins do not all perform the same job.

Different vitamins are involved in different processes, which is why having enough of a variety of vitamins matters.

There are 13 essential vitamins.

What are the 13 essential vitamins?

The essential vitamins are:

• Vitamin A
• Vitamin C
• Vitamin D
• Vitamin E
• Vitamin K
• Vitamin B1, or thiamine
• Vitamin B2, or riboflavin
• Vitamin B3, or niacin
• Vitamin B5, or pantothenic acid
• Vitamin B6
• Vitamin B7, or biotin
• Vitamin B9, or folate
• Vitamin B12

Each vitamin has its own functions in the body.

Because their roles differ, one vitamin cannot simply replace another.

What is the difference between fat-soluble and water-soluble vitamins?

Vitamins can be divided into two broad groups.

Fat-soluble vitamins

The fat-soluble vitamins are:

• Vitamin A
• Vitamin D
• Vitamin E
• Vitamin K

They are absorbed along with dietary fat and can be stored in body tissues.

This is one connection between vitamins and dietary fat.

Water-soluble vitamins

Vitamin C and the B vitamins are water-soluble.

The body handles and stores these differently from fat-soluble vitamins.

Because individual vitamins behave differently, their food sources and recommended amounts also vary.

Which foods contain vitamins?

Different foods provide different combinations of vitamins.

Sources can include:

• Vegetables
• Fruits
• Whole grains
• Legumes
• Nuts and seeds
• Dairy foods
• Eggs
• Meat
• Fish and seafood
• Fortified foods

There is no single food that naturally provides every vitamin in ideal amounts for everyone.

Eating a varied diet helps provide a broader range of vitamins.

Do vitamins provide calories?

Vitamins themselves are not a major source of dietary energy.

They are different from energy-yielding nutrients such as carbohydrates, protein, and fat.

Even though vitamins are needed in much smaller amounts, they are still essential for normal body function.

How much of each vitamin do you need?

There is no single vitamin target.

Each of the 13 vitamins has its own recommended intake, and needs can vary with age, sex, life stage, health conditions, and other factors.

This is why Eat Ate Here groups vitamins as one of the 7 Core Nutrition Areas while still allowing individual vitamins to be examined in more detail.

Is more of a vitamin always better?

No.

Getting too little of certain vitamins can cause problems, but taking large amounts is not automatically beneficial.

High doses of some vitamins can also cause harmful effects.

Food can usually provide many of the vitamins people need, while supplements may be appropriate in specific circumstances.

If you are considering high-dose supplements or have a medical condition, professional advice can be important.

Are vitamin supplements the same as food?

Supplements can provide specific vitamins, but they are not identical to eating a varied diet.

Whole foods can provide combinations of vitamins, minerals, fiber, protein, fats, carbohydrates, and other food components.

Supplements can be useful for some people or situations, but they should not automatically be treated as a replacement for food.

How do vitamins fit into overall nutrition?

Vitamins work within a much larger nutrition system.

Your body also needs protein, carbohydrates, water, fat, fiber, and minerals.

Eating a varied diet can help provide different vitamins alongside these other nutrients.

Practical takeaway

Your body needs 13 essential vitamins, and each vitamin has different jobs.

Instead of focusing on only one vitamin, aim for dietary variety.

Vegetables, fruits, grains, legumes, nuts, seeds, dairy foods, eggs, fish, meat, and fortified foods can all contribute different vitamins to your diet.