In this section:

• Rates of calcium absorbtion
• "anti-nutrients" (oxalates and phytates) reduce the amount of calcium that can be observed.
• Effect of calcium on absorbtion of medications and minerals

Gastric transit time makes a difference in how much calcium you absorb. When food moves too quickly through your digestive system, such as less than 12 hours from start to finish, there is less time to absorb all of the calcium.

Eat or drink your calcium with a meal. It will stay longer in your digestive tract and have time to be absorbed. Your vitamin D status is super important for calcium absorption. Vitamin D sends messages to your gut telling it to bring more calcium into your body