ABSTRACT
Imagine yourself strolling down the aisle in your local grocery store to select your favorite foods for lunch. You pick up a jar of peanut butter, look at the label, and read that there are 190 mg of sodium in one serving. You think to yourself: “I wish I knew how they knew that for sure.” After picking up the lunch items you want, you proceed to the personal hygiene aisle to look for toothpaste. Again you look at the label and notice that the fluoride content is 0.15% weight per volume (w/v). “How do they know that?” you again ask. Finally, you stop by the pharmaceutical shelves and pick up a bottle of your favorite vitamin. Looking at the label, you see that there are 1.7 mg of riboflavin in every tablet and marvel at how the manufacturer can know that that is really the case.
