Large Studies Deliver Mixed News On Vitamin D And Fish Oil


Important new studies deliver much-awaited answers on who does and doesn’t benefit from fish oil and vitamin D.

Healthy people who take fish oil at a dose that’s found in most supplements don’t have a lower heart-related disease or cancer risks. The same goes for vitamin D as well.

On the other hand, higher amounts of a purified, prescription fish oil managed to slash heart issues and heart-related deaths among people with high triglycerides.

Experts said that these results could suggest new ways of treatment for hundreds of thousands of patients like these.

10% of the people in the U.S. take fish oil

About 10% of  U.S. adults are currently taking fish oil, and a higher percentage take vitamin D.

“Those who peddle it promote it as good for everything,” but in this definitive test, vitamin D “showed a big nothing,” said Dr. James Stein, a heart specialist at the University of Wisconsin-Madison.

Fish oil has Omega-3 fatty acids, and they are mostly found in salmon, tuna and more fish.

They have the ability to reduce triglycerides and inflammation, and they bring more benefits as well.

People with high triglycerides who are taking fish oil have fewer heart attacks.

The study leader, Dr. JoAnn Manson at Brigham and Women’s, called this “a substantial benefit,” but several independent experts disagreed because of the way the study was set up to track this and specific other results.

“These findings are speculative and would need to be confirmed in a separate trial,” said the Cleveland Clinic’s Dr. Steven Nissen.

Regarding Vitamin D, it’s pretty hard to get enough of it from foods, and some studies have found that people who have lower levels of vitamin D are more likely to develop cancer, but it’s not yet known whether supplements with vitamin D alter this risk.


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