How do you, personally, decided whether something is unhealthy or not?

If you are from the uk the food standards agency have brought out a traffic light labelling system for identifying how healthy a food is... ie green go ahead, amber eat in moderation and red eat sparingly. I think it is very effective and many of the big supermarkets now use it! hope this helps, it certainly simplifies the whole thing...

Good luck...

in general I look at fat per 100g and saturated fat - whether I consider it high depends on the product and my mood and how much I want to eat it. If it was something unhealthy like ice cream I'd expect the fat to be high, so I suppose I decide based on what I would expect. eg if I look at a pack of biscuits and they're 40% fat then I'd be surprised and think that was more than I'd expect and consider them unhealthy - its a very subjective system I use and not at all scientific.

well im a vegetarian so i eat healthy food and when im buying stuff at the grocery store i look at the nutrion facts for food with low sugar, calories, total fat, and carbs. then i look for foods that are high in all types of vitamins, iron, protein, fiber, calcium, and stuff like that :D

i hope that helps! and also you want to get natural or organic type of food kuz that stuff is always healthy.

I look at fat content first, then calories, then I'll quickly look to see if it has preservatives.

You have to be careful with organic food also, sometimes it still has a high fat content, and it not always your best choice.

Contrary to classical mechanics, one can never make simultaneous predictions of conjugate variables, such as position and momentum, with arbitrary accuracy.

i just decide