The secret to clean eating? Focus on nutrition.

by Kaiser Permanente |
A woman holds a bowl of freshly chopped vegetables

Clean eating has been called many things since it burst onto the wellness scene a few years ago. A whole foods movement. A new dieting trend. A cure-all health craze. Its core concept of eating only natural, "real" food has spawned magazines, lifestyle blogs, and plenty of criticism. So, do we have a handle by now on what clean eating actually is?

In a word, no.

"Clean eating can still mean a lot of different things to different people," says Alyssa George, a registered dietician at Kaiser Permanente’s Oakland Medical Center. She defines it as a whole-foods approach to eating in which the majority of what you eat is organic and fresh produce, whole grains, and plant and animal protein. The point is to avoid processed foods that have artificial ingredients, preservatives, and added sugars.

Sounds great, right? Well, that depends.

Clean eating done right

Eating more fresh food rather than processed food is always a good idea.

"When people start to eliminate processed foods from their diet, they generally start to feel better," George says. "They can have better digestion, improved mood, and possibly sleep better."

When it comes to ultra-processed foods, there are even more reasons to avoid prepackaged meals, sweetened drinks and snacks, and reconstituted meat products like hot dogs, fish sticks, and chicken nuggets. Research has linked them to increased risks of obesity, high blood pressure and cholesterol levels — and even cancer.1

Clean eating also places a priority on avoiding added sugars. And that’s a very good idea. Added sugars have long been associated with weight gain, type 2 diabetes, heart disease, and stroke. A recently published study, for example, examined the long-term effects of sugary beverages — the biggest single contributor of added sugar to Americans’ diets. Researchers found that as people drank greater amounts of sugary beverages, the higher their risk became for death from heart disease.2

Clean eating gone wrong

Of course, as with any diet, people can take clean eating to the extreme. The list of "clean" foods is constantly being narrowed, often by self-proclaimed health gurus, celebrities, and social media influencers. The resulting pressure to eat clean at all times can lead to stress and body anxiety.

That’s why it’s important, George says, to "think of clean eating more as a philosophy around food choices versus a specific diet. It can definitely be a sustainable way of eating, but for people who follow too narrow a definition, it can become overly restrictive."

Indeed, it can turn into an unrealistic pursuit of perfection, an obsession to eat only what’s currently considered the most pure and healthy foods. That type of fixation is considered an eating disorder of its own, known as orthorexia nervosa, and it can lead to unhealthy eating habits, malnutrition, and social isolation.3

A restrictive approach to eating isn’t the same as healthful eating. When you put too many limits on what foods you allow yourself to eat, you can miss out on some of the nutrients you need.

The bottom line: It’s not about eating narrowly. It’s about eating nutritiously.

3 steps to eating more nutritiously ― and yes, a little cleaner, too

Keep it simple

Less takeout. More meals made at home. When you go grocery shopping, choose fresh produce. When you cook, look for recipes that have fewer ingredients ― ones you can pronounce ― and fewer steps. Make larger batches so you’ll have more meals at the ready. For instance, cook a pot of quinoa that you can use later for grain-and-veggie bowls or for salads like this one. And when you do eat packaged food, choose options that have ingredients you’ve actually heard of. A good question to ask, George suggests: "Would your grandma recognize what you’re eating?"

Eat more vegetables

This one goes for everyone, whether you’re trying to eat clean or not. Only 1 in 10 adults is eating at least 2 to 3 cups of vegetables a day — the minimum amount recommended.4 Sneak them into your meals as often as you can. And in those snacks, too. When you need a mid-afternoon energy boost, crunch on carrot sticks, kale chips, or edamame. Or slice up celery sticks to dip into some homemade hummus.

Watch the added sugar

The American Heart Association recommends fewer than 6 teaspoons (25 grams) of added sugar a day for women and fewer than 9 teaspoons (38 grams) for men.5 "Added sugars" are sugars and syrups that are put in foods and beverages as they’re processed or prepared. It’s easy to zoom right past that recommended total, too, because it’s not just the obvious desserts and candy bars you have to limit. Supposedly healthy options like low-fat yogurt, protein bars, smoothies, and soups can be surprisingly full of added sugars.6 Get more of your sweet fix from the naturally occurring sugars in fruits, vegetables, and unsweetened milk.

Want to learn more about healthy eating?

Check out these easy-to-use Kaiser Permanente resources:

Kaiser Permanente’s healthy eating resource

Food for Health: recipe blog

Health classes

1 "Consumption of Ultra-Processed Foods and Cancer Risk: Results From NutriNet-Santé Prospective Cohort," BMJ, February 14, 2018.

2 "Vasanti S. Malik, et al., "Long-Term Consumption of Sugar-Sweetened and Artificially Sweetened Beverages and Risk of Mortality in U.S. Adults," Circulation, April 30, 2019.

3 Elena V. Syurina et al., "Cultural Phenomena Believed to Be Associated With Orthorexia Nervosa," Frontiers in Psychology, September 11, 2018.

4 "Only 1 in 10 Adults Get Enough Fruits or Vegetables," Centers for Disease Control and Prevention, November 16, 2017.

5 "Added Sugars," American Heart Association, accessed April 16, 2019.

6 "17 Foods and Drinks That Are Surprisingly High in Sugar," Healthline, accessed April 23, 2019.