Vitamins are small nutrients, but it’s understandable if the subject feels bigger than it should. With multivitamins, supplements and health advice everywhere, it can be difficult to know what your body actually needs.
Vitamins are organic compounds your body needs in small amounts to grow, develop and function normally. There are 13 essential vitamins, and each has a different role. Most people can get the vitamins they need from a varied diet, while supplements can be useful in certain situations.
What are vitamins, exactly?
Vitamins are micronutrients, meaning your body needs them in relatively small amounts. They don’t provide calories like carbohydrates, protein or fat. Instead, they support processes that keep your body working normally.
There are 13 essential vitamins: A, C, D, E, K and eight B vitamins: B1, B2, B3, B5, B6, B7, B9 and B12. Although they’re often discussed together with minerals, vitamins and minerals are different. Vitamins are organic compounds, while minerals are elements.
You don’t have to remember every vitamin or its job. What matters is understanding that your body needs a range of them, and getting enough is generally part of a balanced approach to nutrition.
Why does your body need vitamins?
Each vitamin has its own role. Vitamin A supports normal vision and healthy tissues. Vitamin C supports connective tissue and helps the body absorb iron from plant foods. Vitamin D helps the body absorb calcium and supports bone health. Vitamin K is involved in normal blood clotting.
The B vitamins are a larger group, and they support several processes, including energy metabolism, red blood cell formation and normal nervous system function. Vitamin B12 is especially important for blood cells and neurological function. Vitamin E acts as an antioxidant that helps protect cells from oxidative damage.
That can sound like a lot, but there’s no need to manage each nutrient separately every day. Eating a variety of nutritious foods is the simplest way to give your body access to many different vitamins.
What are the two types of vitamins?
Vitamins are commonly divided into two groups based on how they dissolve and are stored.
Fat-soluble vitamins include A, D, E and K. They can be stored in the liver and fatty tissues. Because the body can store them, taking large amounts from supplements can be a concern.
Water-soluble vitamins include vitamin C and the B vitamins. The body generally stores less of these vitamins, so regular dietary intake is important. Vitamin B12 is an exception because the body can store it for a longer period.
The distinction is useful because it helps explain why more isn’t always better. A vitamin is still a nutrient, not something that becomes safer simply because it is sold over the counter.
Where do vitamins come from?
Food is the best starting point for most people. Canada’s Food Guide recommends eating a variety of vegetables and fruits, whole grain foods and protein foods. That variety helps you obtain different nutrients rather than relying heavily on one food.
Vitamin-rich foods can include leafy green vegetables, colourful vegetables and fruits, whole grains, legumes, nuts and seeds, eggs, dairy products, fish and fortified foods. The exact amount of each vitamin varies between foods.
Some vitamins can also come from sources outside food. For example, the body can produce vitamin D when skin is exposed to sunlight, although the amount produced depends on factors such as season, time of day, cloud cover, sunscreen use, age and skin pigmentation.
Health Canada notes that vitamin D is found in relatively few foods, which is one reason it provides specific guidance about getting a daily dietary source.
Do you need vitamin supplements?
Not everyone needs a vitamin supplement. If you regularly eat a variety of nutritious foods, you may already be getting what you need.
There are situations where supplements are recommended or may be considered. Your age, pregnancy status, diet, health circumstances and certain medications can all affect nutritional needs. A healthcare professional can help determine whether supplementation makes sense for you.
For example, Health Canada recommends that adults and adolescents who could become pregnant take a daily multivitamin containing 400 mcg of folic acid. Health Canada also recommends a daily dietary source of vitamin D for people aged 2 to 50, and advises adults 51 and older to take 400 IU (10 mcg) of vitamin D daily.
These recommendations don’t mean everyone should start taking several supplements. They show why vitamin needs can be personal and why general advice doesn’t always apply equally to every person.
Can you get too many vitamins?
Yes. Taking more than your body needs can sometimes cause problems.
This is particularly important with high-dose supplements and fat-soluble vitamins, which can accumulate in the body. Excess amounts of some vitamins can cause adverse effects, and supplements can also interact with certain medications.
For that reason, it’s sensible to check the label before combining a multivitamin with other products. You may unknowingly take the same vitamin from several sources.
If you take prescription medication, are pregnant or breastfeeding, have a medical condition, or are considering a high-dose supplement, talking with a pharmacist or healthcare professional first is a sensible step.
What happens if you don’t get enough vitamins?
A vitamin deficiency happens when the body doesn’t get or absorb enough of a particular vitamin. The effects depend on the nutrient involved and how long the deficiency continues.
Some deficiencies can be linked with specific health problems. For example, inadequate vitamin C can cause scurvy, while inadequate vitamin D can affect bone health. Vitamin B12 deficiency can affect red blood cell formation and the nervous system.
Still, common symptoms such as tiredness, weakness or changes in how you feel don’t automatically mean you have a vitamin deficiency. Many conditions can cause similar symptoms.
If you’re worried about a possible deficiency, it’s better to discuss your concerns with a healthcare professional than to assume which vitamin is missing and start taking a high dose.
Do children, adults and older adults need different vitamins?
Nutritional needs can change throughout life. Children need nutrients to support growth and development. Adults need adequate nutrition to maintain normal body functions, while older adults can have different nutritional considerations.
Pregnancy is another stage where certain nutrients become especially important. Health Canada’s folic acid guidance is one example.
Diet can matter too. People who avoid certain food groups may have fewer dietary sources of particular nutrients. For instance, vitamin B12 is naturally present mainly in animal-based foods, so people following a vegan diet may need fortified foods or a B12 supplement.
That doesn’t mean a particular diet is automatically unhealthy. It simply means that food choices can change where certain nutrients come from.
How can you get more vitamins from food?
You don’t need to make your meals complicated. A few simple habits can make it easier to get a broad range of nutrients.
Start by choosing a variety of foods rather than eating the same small group of foods every day. Include vegetables and fruit, whole grains and protein foods across your meals. Fortified foods can also contribute important nutrients.
Reading the Nutrition Facts table can help you understand the nutrients in packaged foods. Health Canada’s Canadian Nutrient File also provides nutrient information for thousands of foods commonly consumed in Canada.
If your diet is restricted because of allergies, preferences, medical needs or lifestyle choices, you may need a little more planning. A dietitian, doctor or pharmacist can help you identify practical options without making food feel unnecessarily complicated.
What should you know before taking vitamins?
Before starting a supplement, consider why you want to take it. If you’re concerned about a deficiency, ask whether there is a reason to suspect one and whether testing or professional advice is appropriate.
It’s also helpful to check the amount per serving, whether another supplement or fortified food already contains the same nutrient, and whether the product could interact with medications you take.
A supplement can be useful when there is a genuine nutritional need. It shouldn’t be treated as a replacement for a varied diet. Health Canada’s dietary guidance generally emphasizes nutritious foods first, with supplementation recommended for particular life stages and circumstances.
If you’re still unsure, you can bring your questions to a pharmacist. A pharmacist can review the vitamins or supplements you’re considering, look at potential medication interactions and help you understand whether a product fits your situation.
Understanding vitamins doesn’t have to feel overwhelming
Vitamins are essential nutrients, but taking care of your nutritional needs doesn’t have to become a daily guessing game.
For most people, a varied diet is the foundation. Supplements have a role when dietary intake isn’t enough or when a specific life stage or health circumstance creates an increased need.
If you’re unsure about what you need, start with a simple conversation with a healthcare professional rather than trying to diagnose a deficiency yourself. Praxora Pharmacy provides pharmacy services and medication guidance in Brampton, including support with health questions and over-the-counter products.