First thing is to look at the ingredient list. When the list goes on and on, it is probably loaded with a lot of extra ingredients that are processed or unnatural. In addition, this may also be a red flag for added sugars and saturated fats. Yogurt bars are also quite deceiving, and typically..it is not real yogurt but added sugar or a saturated fat. So, checking to make sure the first ingredient is a wholesome ingredient like oats, instead of sugar.
Fiber is also important to be included in a bar, at least 3 grams of fiber per serving. This will increase long-term energy to help fuel your workouts. However, be sure to avoid eating a high fiber bar right before the workout, to allow adequate digestion.
A healthy bar should have around 200 calories, 15 grams of protein and low added sugars.
Here are my top favorites.. :-)