The percentage of calcium under the Nutrition Facts is a guide to the nutrients in one serving of food.
This is also known as 'The Get Enough of These' part as most Americans don't get enough dietary fiber, Vitamin A, Vitamin C, calcium and iron in their diets.
Eating enough of these nutrients can improve health and help reduce the risk of some diseases and conditions.
In this case, 3% calcium would mean that one serving provides 3% of the calcium needed each day, based on the 2,000 - calorie diet.
If you have an underlying medical condition, we highly recommend that you consult with your doctor first before trying any food supplements.