Low-fat, high-carbohdrate is the big thing today. Eating fat will make you fat, right? Wrong! If you ate all of your allotted calories from fat you wouldn't gain weight! (You may have high cholesterol though).
Did you know that eating a low fat, high sugar diet actually increases lipogenesis (the formation of fat). In times of excess energy, insulin stimulates triglyceride storage. High levels of insulin increases the activity of Acetyl CoA Carboxylase, thus increasing lipogenesis.
Take a look at the back of a package that is "low-fat." Most of the time, the fat is removed and sugar is added in its place. Why? Well, if you take out the fat, it doesn't taste as good. But if you add sugar, it becomes that tasty treat again.
Did you know carbohydrates are not essential, technically? A story for another day. But essentiality is dependent on whether or not your body could make the nutrient for itself. Carbohydrates can be made in the body from non-carb sources. Interesting, since carbohydrates take up a huge portion of the new plate. But again, another story for another day.
So, if you want to use your full-fat creamer, do it! If you want to eat you full-fat chips, do it! Have no fear of the fat!