By Rayna Magesh and Abbie Hall

What does it do?

Calcium keeps your bones healthy, prevents blood clots, and helps your nerves send messages to your muscles.

Consequences of Low Calcium

More mildly low calcium in your blood can cause muscle or nerve twitches, muscles cramps, muscle spasms, depression or irritability, and numbness of the extremities.

Severely low calcium levels can cause you to feel confused or disoriented and can cause your heart to have irregular, spastic contractions.

Major Food Sources

Milk, yogurt, and cheese, Chinese cabbage, kale, and broccoli.