In the 1940s and 1950s, cities across North America began adding this mineral to their water supplies in a bid to prevent tooth decay.

This mineral, essential for healthy bones, is found in dairy products. But you can also get it from dark-coloured greens, like broccoli, spinach and kale.

Citrus fruits, like oranges and grapefruits, are a prime source of this vitamin, also known as ascorbic acid.

The average Canadian consumes 3,400 milligrams of this mineral every day—more than double the recommended amount.

Vegetarians often don’t get enough of this vitamin, which is commonly found in animal products. A shortage can cause everything from memory loss to numbness in the arms and legs.

This mineral, found in abundance in red meat, helps transport oxygen in the blood. Not having enough can lead to fatigue and a weakened immune system.

Essential for a healthy thyroid, this mineral is often added to table salt.

Cosmetic companies boast about the wrinkle-fighting power of this vitamin. But studies say there is little evidence it slows the aging process.

How many vitamins are there?