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Real members of MyMyelomaTeam have posted questions and answers that support our community guidelines, and should not be taken as medical advice. Looking for the latest medically reviewed content by doctors and experts? Visit our resource section.

Does taking calcium together with K1/K2 pose a risk for heart attacks if you are a multiple myeloma patient?

A MyMyelomaTeam Member asked a question 💭
Lake Charles, LA

Taking calcium supplements—especially when combined with Vitamin D—can increase the risk of heart attacks (myocardial infarction) by creating excess calcium in the blood. For a multiple myeloma patient no, this risk is potentially higher because the disease itself destroys bone, often leading to already elevated levels of calcium in the bloodstream (hypercalcemia)
PubMed Central (PMC) (.gov)
PubMed Central (PMC) (.gov)
+2
However, the addition of Vitamin K2 is believed to help mitigate this… read more

April 22
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Answer Summary

Members discussed the risks and benefits of taking calcium with K1/K2 supplements as multiple myeloma patients, focusing on concerns about... Read more

Members discussed the risks and benefits of taking calcium with K1/K2 supplements as multiple myeloma patients, focusing on concerns about heart attack risk, dental deterioration, and hypercalcemia. Several members shared personal experiences, including one who had a heart attack when calcium levels were elevated and later found that daily K2 supplementation helped normalize levels and improve overall health, while others noted confusion around conflicting doctor advice about Vitamin K. A recurring theme was the importance of consulting your oncologist before taking any supplements, splitting calcium doses for better absorption, and wishing that routine vitamin level testing was more widely available to guide personalized decisions.

A MyMyelomaTeam Member

Just wished we all knew what levels of vitamins we have so we know for sure what we actually need.

April 24
A MyMyelomaTeam Member

The dilemma I’m facing is if I stop all calcium supplements per doctor’s advice then noticing teeth are deteriorating what can I do to stop this without causing a heart attack from calcium getting into my blood stream and going straight to my heart and does taking vitamin K1/k2 redirect the calcium to my bones where it needs to go preventing a heart attack?

April 22
A MyMyelomaTeam Member

For multiple myeloma patients, the best calcium supplements are generally calcium citrate or calcium carbonate, ideally taken alongside Vitamin D3 (1,000 IU/day) to boost absorption. A typical recommendation is 1,200–2,000 mg daily (combined food and supplements), often with 500 mg maximum per dose to improve absorption. Always consult your oncologist first, as hypercalcemia (high calcium) is a risk.
Multiple Myeloma Research Foundation
Multiple Myeloma Research Foundation
+4
Key Considerations for Myeloma Patients:
Best Forms:
Calcium Citrate: More easily absorbed, especially for those on acid-reducing meds.
Calcium Carbonate: Provides higher elemental calcium per tablet.
Optimal Intake: Your body cannot absorb more than 500 mg of calcium at one time. Split doses throughout the day (e.g., 500 mg twice a day) rather than taking the full 1,000–1,200 mg at once.
Vitamin D: Vitamin D3 (cholecalciferol), often 1,000 IU/day or 50,000 IU monthly, is essential to assist in calcium absorption.
Food Sources: Incorporate calcium-rich foods like milk, yogurt, cheese, broccoli, and kale to help meet daily needs.
Safety Warning: Some myeloma patients have higher than normal calcium levels (hypercalcemia). Taking calcium supplements without a doctor’s recommendation can be dangerous.
WebMD
WebMD
+4

April 28
A MyMyelomaTeam Member

I’m still taking supper K1/K2 by life extensions vitamins E magnesium now there is many kinds of calcium. There is calcium citrate and calcium carbonate which is best to take? And why for multiple myeloma patients?

April 28
A MyMyelomaTeam Member

I get my vitamin d tested each year. That's the only one that gets tested

April 26

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