There are 4 food groups (in order of how much we should consume): vegetables and fruits (green, grain products (yellow, milk and alternatives (blue, meat and alternatives (red) They are represented in the canada food guide rainbow in this order w/ these colours. Major nutrients are: carbs, fats, protein, fibre, iron, zinc, magnesium, potassium, No single group provides all nutrients, which is why we need to eat from all 4 groups. Important nutrients in food groups: vegetables and fruits : vitamin a, vitamin c, folate, potassium, grain products: fibre, magnesium, milk & alternatives: calcium, vitamin d, meat & alternatives: protein, iron, vitamin b12, zinc. Recommended number of food guide servings per day varies b/w individuals depending on age & sex, in order to meet their needs and reduce risk of chronic disease. The secret to healthy eating: eat small amounts of a lot of different foods.