If you look on pretty much every package of food there is a nutrition facts label. On that label there is a breakdown of how many calories per serving, fat, carbs and protein content. Depending on what it is, there may also be vitamin levels shown. There is also a serving size. The serving size is not really a recommended portion size. It is there to tell you how much of the breakdown is in each serving.
But if you are looking to help shed some pounds of fat, using a serving size as a portion wouldn’t be a bad idea. It will help make it easier to track what you eat for a day without having to write everything down. When I was in the navy, portion control was performed by using food trays and serving spoons. Most items were served by a spoon the size of an ice cream scoop. That’s about half a cup.
The serving tray also makes sure that the portion sizes are what they wanted us to have. I don’t think it’s any coincidence that when we went out to sea, I always lost weight. On a six month cruise I lost 30 pounds in the first three months and I didn’t even do any “exercise”.
I attribute this to portion sizes and the fact that there were no fast food joints around. We did have soda machines and candy vending machines. I did drink plenty of soda and every once in a while I would grab a candy bar, but for the most part I ate at the galley every single meal.
I look at how much rice I get served, at restaurants and at families homes, and it’s always a lot more than I received in the Navy. I could probably eat the whole rice portion in 2-3 fork fulls, but restaurants give me more than half the plate of rice. Crazy. Do portion sizes matter? I think so.