Some of the weight-loss aids that have quickly emerged to replace the now-banned substance ephedra may carry risks of their own, a small study suggests.

Researchers at the University of California, San Francisco found that two ephedra-free diet supplements increased the heart rates of 10 healthy volunteers, and one also raised their blood pressures. These effects are similar to what has been seen with ephedra, an herbal stimulant that was banned in the U.S. last year after reports linked it to heart attacks, strokes and at least 155 deaths.

Read more about study findings related to health risks of ephedra free diet pills at http://www.msnbc.msn.com/id/9428149/.