Simple sugars give you a quick sugar rush, but afterwards you will have less energy and feel sluggish. Refined sugars may also speed up the aging process.
Steps
Read the labels. It will say how many grams of sugar it has.
Bear in mind that some things, like pineapples, do not need added sugar to have an excess level of sugar.
Look at the ingredients. Added sugars will usually end with -ose, such as sucrose, glucose, fructose, maltose and dextrose. If it rhymes with Gross, It's bad for you.
Never eat anything that has a sugar as the first thing on the ingredients list. This means there is more sugar than any other ingredient.
Tips
They have not determined a "daily value" for sugars; and ideally, you might be supposed to consume no sugar each day, but just try to exercise moderation.
Warnings
It is not healthy to replace simple sugars with bad fats or artificial sweeteners.