Every generation has its food and exercise fads. Juice diets, jazzercize, cabbage soup– at one point low fat diets were the go-to way to lose weight, only to be replaced by low carb diets.

There’s a new crowd out there redefining what it means for food to be “healthy.” Namely, that avoiding chemicals, conventionally raised livestock or GM produce constitutes a more healthful diet than monitoring portion size and nutritional content.

While nutrition science is notoriously tricky, one piece of conventional wisdom still rings true: If your calorie intake exceeds your calorie output, your body fat will increase over time.

Butter, even if it comes from a grass-fed, pasture-raised, organic dairy cow, still contains 100 calories per tablespoon, all of which come from fat. And although knowing your poultry was raised…