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How to Reduce Your Risk of Colon Cancer AND Build Strong Bones

Do you ever wonder what happens to the calcium that doesn’t get absorbed by your body?

Research has shown that you only absorb about 36% of elemental calcium (the actual amount of calcium in a supplement) when you take 350 mg per dose.

Now don’t let that alarm you, in fact as it turns out, our bodies still make use of the unabsorbed portion of the calcium we consume

Let me tell you how…

How Calcium Rids Your Body of Harmful Substances

The remaining 64% (or so) of calcium that isn’t absorbed is actually passed through your digestive tract and cleans it out.

Lara Pizzorno, author of “Your Bones” explains it best in her latest video:

“Calcium remaining in food residue or from supplements that you take actually combines in your intestines with harmful substances that are left over from digestion such as oxalic acid or unabsorbed fatty acids and bile acids and this is the mechanism through which high calcium diets actually reduce our risk of kidney stones and cancer, because that calcium combines with potentially harmful substances and puts it in stool so that it is evacuated from your body.”

In other words, the remaining unabsorbed calcium actually acts as a vehicle where it combines with toxic substances and rids it from your body.

Calcium Supplements May Support a Healthy Colon

According to an October 2014 study done by researchers at Harvard School of Public Health, for every 300 mg increase in calcium intake, it was associated with a 9% decreased risk in colorectal cancer.

This meta-analysis took 15 studies with 12,305 cases where the intake was 250 mg of calcium per day to 1,900 mg of calcium per day. While this shows a large gap between calcium intake of cases, researchers still associated a decreased risk of colorectal calcium with increased calcium intake. Although it is important to mention that cases with higher ranges of calcium intake (1,000 mg per day or more) showed a less steep risk reduction, but still a reduction.

Bringing it All Together

As it turns out, in addition to cleaning your system of unwanted particles, the unabsorbed calcium that is left in your body may reduce your risk of colon cancer too.

As the calcium works its way through your intestines, it binds to damaging toxins that haven’t made it through your digestive tract and safely removes them from your body where it can no longer do you harm.

As you can see, calcium is not only crucial when it comes to your bone health, but also plays a role in eliminating toxins from your body and reducing your cancer risk. All the more reason to make sure you get your daily dose!


Author: Monica Straith, BS

Monica is the PR and Outreach Manager and Fitness Lead at AlgaeCal. She’s an ACE Certified Personal Trainer and Nutrition Specialist, and has a B.S. and B.A. from the University of Wisconsin-Madison, where she played varsity soccer for four years. Monica pulls from her experience in athletics and health to contribute to AlgaeCal and has also been featured on myfitnesspal blog, Prevention, and Huffington Post.