Today, a healthy diet isn’t simply a matter of including foods from all the major food groups, Leslie Beck writes.Jeff Couch/Getty Images
It’s a long-standing nutrition recommendation: Eat a balanced diet. It’s also a rather vague piece of advice.
For years, food guides reinforced a food-group approach to healthy eating. So when you hear “balanced diet,” you may think it means eating meals that include every major food group in the right proportions.
The concept of a balanced diet, however, has evolved considerably as nutritional science has advanced and the nutrition-related health challenges facing Canadians have changed. Our current understanding of balance goes beyond simply putting all the food groups on your plate.
Here’s what a balanced diet looks like today, plus how to tell whether your diet stacks up.
‘Balanced diet’ through the decades
Canada’s first food guide, introduced in 1942, was focused on getting enough of the right foods and nutrients to prevent deficiencies and support health.
Over time, as chronic diseases became a greater public health concern, nutrition guidance expanded to also not getting too much. Healthy eating advice was aimed at meeting nutrient needs while limiting dietary components linked to chronic disease.
Food groups became an easy way to put this advice into practice: Eat a variety of foods from the major food groups in recommended amounts.
Balance: one key principle of healthy eating
Today, a healthy diet isn’t simply a matter of including foods from all the major food groups. It also needs to provide enough energy (calories) and essential nutrients, include a wide variety of nutritious foods, contain appropriate proportions of carbohydrate, protein and fats, and leave some room for less nutritious foods.
According to the World Health Organization, a healthy diet is built on four core principles: nutrient adequacy, balance, moderation and diversity. Balance, in the WHO framework, means matching your calorie intake with your daily energy needs and getting adequate amounts of protein, carbohydrates and fats.
What we often think of as a “balanced diet” is broader than balance alone. A balanced diet is about getting enough of what you need, while considering the quality, variety and proportions of what you eat over time.
How balanced is your usual diet?
The following often overlooked signs may indicate your diet is less balanced than you realize.
1. You eat the same healthy foods over and over
Salmon, broccoli, brown rice and Greek yogurt are certainly nutritious. But eating similar foods day in and day out limits dietary diversity. No single food provides everything we need.
Eat a variety of foods within and across food groups to get a broader range of nutrients and, in the case of plant foods, protective phytochemicals.
2. You prioritize protein at the expense of other foods
Today’s fixation on protein can crowd out other nutritious foods, especially whole grains, fruit, pulses, nuts and seeds. These foods supply lots of fibre, which is important for digestion and cardiometabolic health, but they’re also plentiful in vitamins, minerals and countless phytochemicals that help guard against chronic disease.
While protein matters, make room on your plate for a variety of other nutrient-dense foods.
3. There’s little variety in your protein sources
If most of your protein comes from meat, fish and dairy, you’re missing out on nutrient-packed plant-based foods.
Add more pulses (chickpeas, black beans, kidney beans, lentils), tofu, edamame, tempeh, nuts and seeds to your regular rotation.
In addition to plant protein and fibre, many of these foods are also excellent sources of folate, as well as blood-pressure-regulating magnesium and potassium.
4. Vegetables shine at dinner, but are missing at other meals
An evening meal that features plenty of vegetables may give the impression of a vegetable-rich diet even when, in reality, they account for a relatively small share of what you eat over the day.
Vegetables (and fruit) are foundational foods of a healthy, balanced diet. Health Canada advises having them fill roughly half your plate and making them the largest proportion of foods you consume overall.
Besides enjoying them at dinner, add vegetables to egg dishes and smoothies at breakfast, plus sandwiches, soups and grain bowls at lunch and snacks during the day.
5. Your go-to vegetable is green salad
If a leafy green salad is a staple vegetable serving, that’s great. Leafy greens are excellent sources of vitamins, minerals and phytochemicals that are important for good health.
Make a point, though, of eating other colourful vegetables to expand your nutrient and phytochemical intake.
Include bright-orange vegetables (such as carrots, sweet potato and butternut squash) for beta-carotene and red, yellow and green bell peppers for vitamin C. Cabbage, cauliflower and broccoli provide unique phytochemicals thought to help guard against cancer.
Enjoy cooked vegetables, too. Cooking vegetables makes calcium, iron, beta-carotene, brain-friendly lutein and lycopene more available for the body to absorb.
The healthy aging payoff
Researchers don’t measure a “balanced diet” per se, but they do measure something similar: overall diet quality.
Evidence from observational research suggests that people who consistently eat a high-quality diet in midlife are more likely to reach older age free of major chronic disease while maintaining their physical, cognitive and mental health.
According to a 2025 study published in Nature Medicine, several healthy diet patterns are tied to healthy aging.
It seems there isn’t just one healthy and “balanced” way to eat.
Leslie Beck, a Toronto-based private practice dietitian, is director of food and nutrition at Medcan.