Take olive oil, for example. It's high in fat and calories but it's really good food. When used in a well-balanced eating plan, it's part of what makes the plan healthy. Or consider whole grain bread. Wheat isn't something we can readily eat if it isn't processed to a degree. But it remains good food if the wheat isn't stripped of vitamins, minerals and fiber when it's made into bread.

Not all "good" food is good for everyone, however. Take the person who is gluten sensitive. Whole grain bread may actually be even worse for that person because it may contain more gluten than the refined version. Yes, it can get complicated.

The idea of enjoyment complicates things even further. But it's important because pleasure is good for our health, too. If we don't enjoy our food, we likely don't get the full benefit of it. When we're enjoying something, our bodies are more relaxed, and digestion and metabolism work better. We feel better as a result.

So my definition of good food includes what supports our bodies, and that can be very individual. What's good for me may not be good for you. But for all of us, enjoyment works. A key, then, is to learn to enjoy healthy eating, which can be a challenge for those of us who still define good food in the old way.

Read about SELF editor Paula Derrow's Pleasure Diet with which she's learning how to enjoy healthy eating that's defined in the new way.

How do you define good food?

Marsha Hudnall, MS, RD, CD, is program director and owner of Green Mountain at Fox Run, a women's live-in healthy weight loss center in Vermont, where helping women find the pleasure in healthy eating is a primary goal.