Editor's note: Cynthia Sass is a registered dietitian with master's degrees in both nutrition science and public health, and the author of "S.A.S.S! Yourself Slim: Conquer Cravings, Drop Pounds and Lose Inches." Connect with Cynthia on Facebook, Twitter and Pinterest.
(Health.com) -- The first time I heard the word "clean" in relation to food was way back in the mid-1990s. I attended a conference about supermarket trends, and learned that grocery chains were starting to "clean up" store brand ingredient lists by removing unrecognizable terms.
Back then, this move was considered controversial, because it involved doing away with added nutrients, listed by their technical, non-household names (like pantothenic acid, a B vitamin), as well as eliminating preservatives, which meant short shelf lives (e.g., would consumers really want bread that gets hard or moldy within a few days?).
But, the writing was on the wall. Consumers were starting to pay attention to how foods were made, and what they were made of, health food stores were attracting more and more customers, and Wild Oats Markets (a chain of natural food stores and farmer's markets, later acquired by Whole Foods) experienced a remarkable 4-year growth of 544% between 1989 and 1993, making it one of the fastest growing small companies in America.
Today, two decades down the road, clean eating, or eating clean, is a major movement, spurred by people from all walks of life who want to feel good about what they're putting in their bodies.
When I asked via Twitter, "What does clean eating mean to you?" I received a variety of replies, from simply "eating fresh fruits and veggies," to "not eating anything artificial."
Over the years, I've honed my personal definition of what it means to eat clean, and while I'm sure it will continue to evolve, here's my current take on what this philosophy (which I'm a huge fan of) is all about:
Eat whole foods
This one is pretty straightforward -- instead of a banana nut muffin, eat a banana and some nuts! The primary principle of eating clean is to replace processed foods with fresh and natural foods. To me, this means foods that haven't had anything added to them, and haven't had anything valuable taken away.
So, even if you're not growing quinoa in your back yard, you can buy this whole grain in the bulk section of your market, or in a box, where the only ingredient is quinoa, and only quinoa. That's a far cry from a refined grain, that's been stripped of its fiber-rich bran (outer skin) and nutritious germ (the inner part that sprouts into a new plant), bleached, and doctored up with preservatives.
Let ingredients guide you
I don't think it's realistic to never eat anything that comes out of a jar, box, or bag, but when you do, the very first thing a clean eater looks at is the ingredient list. Reading it is the only way to really know what's in your food, and choose foods that are as close to their natural state as possible.
For example, I was once at the market with a client who was on a mission to clean up her diet. She said, "I bet crackers are out of the question, right?" My response was, "Let's look at the ingredients!"
I picked up one of my favorite brands, which are made with: organic short grain brown rice, organic whole quinoa, organic pumpkin seeds, organic sunflower seeds, organic brown flax seeds, organic brown sesame seeds, organic poppyseeds, filtered water, sea salt, organic sea weed, organic black pepper, organic herbs -- all "real" and recognizable ingredients; a list that practically reads like a recipe I could recreate in my own kitchen.
We then checked out her usual brand, made with (among other things): sodium acid pyrophosphate, monocalcium phosphate, and TBHQ (short for tertiary butylhydroquinone). Dumfounded, she said, "I saw reduced fat on the box and assumed it was OK, I never even thought about reading the ingredients."
Bingo! Clean eating is about focusing on quality first, and not letting terms like zero trans fat, low sodium, or sugar free fool you into thinking that a processed food is healthy.
Think big picture
In addition to reading ingredient lists, so you can ditch products made with artificial additives including flavors, sweeteners, colors, and preservatives, clean eating is about steering clear of foods made from genetically modified organisms, and those treated with hormones and antibiotics, and going organic when possible, to reduce foods grown with man-made pesticides and fertilizers.
In my opinion, clean eating considers how these issues affect you, as well as how they influence the planet, and their bearing on a sustainable food supply. In other words, in addition to choosing not to pollute your body with substances that serve no biological purpose, clean eating is also about connecting the dots regarding how food production impacts issues like the rise in antibiotic-resistant bacteria, algae blooms and "dead zones" in our oceans, and the effects of substances like BPA on our metabolisms.
This is why clean eating is a movement, not a trend.
One aspect of clean eating I really love is replacing packaged foods with homemade versions, from salad dressing to energy bars and everything in between. I call it "retrotarian" eating, because it harkens back to a time before things like frozen chicken nuggets existed, and many of the do-it-yourself substitutes are very simple.
For example, when I make a stir fry, instead of buying a pre-made sauce, laden with sodium, sugar and preservatives, I whisk together a little brown rice vinegar, fresh squeezed citrus juice, minced garlic, and fresh grated ginger.
These days, you can find a clean recipe for just about anything, including five-ingredient ice cream, and "old school" food trends, like homemade baby food and pickling veggies in Mason jars, are making major comebacks.
Listen to your body
To me, part of eating clean is thinking of food as preventative medicine. After all, the phrase "you are what you eat" is literally true, so being thoughtful about your food just makes sense.
Nutrients create the foundation for the structure and function of every cell in your body, and because your body is in a continuous state of maintenance and repair, the health and functioning of your cells is directly determined by what you've been eating.
Whole, natural foods provide the building blocks that go to work to uphold your muscles, bones, organs, immune system, and hormones. So cleaning up your diet is a lot like starting to build and support your body with the highest quality raw materials.
For these reasons, I've seen a commitment to clean eating truly transform my clients' lives, from clearer, glowing skin and shinier hair to more energy, better mood and sleep quality, clearer thinking, less aches and pains, and even a greater sex drive.
And if they slip back into old patterns, they really feel the effects. After going on a trip, relying on processed "road food" for a long weekend, and feeling like a zombie, one client couldn't wait to get back to eating clean. And when she did, her bloating, fatigue, and apathy disappeared. Pretty powerful! So if you're just getting started, begin by pulling out the foods in your fridge, freezer, and cupboards, reading the ingredients, and cleaning house, no pun intended.
This article originally appeared on Health.com.
Copyright Health Magazine 2011