Remember when margarine was healthier than butter? That was before studies revealed how unhealthy synthetic trans fats can be. Nutrition science is constantly changing, and with it, the reputations of formerly vilified foods.

24/7 Tempo reviewed dozens of foods that are often considered unhealthy and found the ones with redeeming qualities, either due to their nutritional content or our updated understanding of dietary fats and cholesterol.

The current medical consensus around the causes of heart disease is shifting, and certain fats and cholesterols are proving to be less of a factor than sugar and excessive carbohydrate intake. In addition, the idea that eating fat makes you fat is a myth.

Eating in moderation and avoiding excessive sugar intake is a much better strategy than seeking out reduced-fat versions of snacks, which often have added sugars and carbohydrates to make up for the flavor loss.

If you need a quick fix, these snacks have your back, and here are some “healthy” foods that are actually ruining your diet.

Click here to see junk foods that are actually not so bad for you