Carotene, or pro-vitamin A, comes from plant products. The liver transforms it into vitamin A. 

Retinol, from animal products, is found in significant quantities in fish liver oils. It truly becomes the "sight vitamin" and improves night vision. It's particularly helpful to people who drive at night and feel blinded by oncoming headlights.

It's an exceptional vitamin for maintaining healthy skin and it has firming properties, as well as fighting infections.

Are you from the generation that was forced to choke down a spoonful of cod liver oil every morning, scrunching up your eyes and nose to try to avoid the taste?

Vitamin A is found in:

• the liver of certain fishes such as halibut, cod and tuna
• beef, calf and chicken liver
• butter in its natural uncooked form; milk
• egg yolk
• green, red and orange vegetables, particularly carrots, tomatoes and spinach
• some fruits such as apples, blueberries and dried apricots