How can you get extra calcium in your system?

Dairy is best source. Dairy is the best calcium source. Non-dairy sources: calcium fortified soy milk, calcium fortified rice milk, tofu, sardines, beans, almonds, calcium fortified orange juice, bok choy, mustard greens, turnip greens, enriched breakfast cereals, etc... A shopper should always check the food labels to see how much calcium is in a serving. Also, tum's smoothies is often used as a calcium source.