l-Carnatine when used in large amounts for the wrong reasons can cause problems for the heart. Interestingly, taken properly under the direction of a good naturopath,it can help to build heart muscle. But I would not take it in large doses for extended period of time. Because yes, it has been linked to coronary problems when used as anything other than a medicine.
My goal is to get a grip on the previously relentless lifetime of yoyo syndrome. And stay in maintence at my current goal weight which I worked so hard to attain.