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PHILADELPHIA (CBS/AP) – New studies find most people won’t benefit from taking daily low-dose aspirin or fish oil supplements to prevent a first heart attack or stroke.

The research was discussed Sunday at the European Society of Cardiology meeting in Munich. The aspirin studies used 100 milligrams a day, more than the 81-milligram pills commonly sold in the United States but still considered low dose. Adult strength is 325 milligrams.

Aspirin is now recommended for lowering the risk of a second heart attack in people who already have suffered one.

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The new research does not change that advice.

Researchers say for those who have not experienced a heart attack or stroke, aspirin’s benefits did not outweigh the risk of serious bleeding it can cause.

(©Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)