Do certain foods make one fat?

I think everything that is like cake, fast food (pizza), quick meal (Cereal, cookies, juice), pasta make Sims fat if they don't do any activities and sleep a lot. Most of the Sims I play are usually pretty active and one thing I noticed is that if they use the weight lifting equipment they bulk up in muscle mass, if they use the treadmill every day they get defined (shredded) or skinny. I'm curious to see a dietary chart too because some of them do affect size, like that high protein meal.