December 03, 2025

Calcium Supplements and Dementia — Major Study Busts Long-Held Myth

7 minutes

Calcium supplements were long feared to increase dementia risk, but new long-term research found no connection between calcium use and cognitive decline, even among women with heart disease or prior strokes
The 14.5-year study published in The Lancet Regional Health showed that calcium carbonate supplements did not raise dementia-related hospitalizations or deaths, dispelling decades of concern about vascular calcification or brain damage
Your brain and bones rely on nutrient synergy — calcium works best when paired with magnesium, vitamin D3, and vitamin K2, which ensure calcium strengthens bones instead of depositing in arteries or soft tissue
Keeping your calcium-to-phosphorus ratio near 1:1 is key for both skeletal and cognitive health, since excessive phosphorus from processed foods, soda and meat-heavy diets forces calcium out of bones and contributes to arterial calcification
The safest way to protect your brain and bones is through whole-food calcium sources such as raw grass fed cheese, yogurt, and eggshell powder, paired with balanced sun exposure and nutrient cofactors that keep calcium working where it should

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By Dr. Mercola

4.6

14871,487 ratings

December 03, 2025

7 minutes

Calcium supplements were long feared to increase dementia risk, but new long-term research found no connection between calcium use and cognitive decline, even among women with heart disease or prior strokes
The 14.5-year study published in The Lancet Regional Health showed that calcium carbonate supplements did not raise dementia-related hospitalizations or deaths, dispelling decades of concern about vascular calcification or brain damage
Your brain and bones rely on nutrient synergy — calcium works best when paired with magnesium, vitamin D3, and vitamin K2, which ensure calcium strengthens bones instead of depositing in arteries or soft tissue
Keeping your calcium-to-phosphorus ratio near 1:1 is key for both skeletal and cognitive health, since excessive phosphorus from processed foods, soda and meat-heavy diets forces calcium out of bones and contributes to arterial calcification
The safest way to protect your brain and bones is through whole-food calcium sources such as raw grass fed cheese, yogurt, and eggshell powder, paired with balanced sun exposure and nutrient cofactors that keep calcium working where it should

...more