1) Mytgarlich Garlic helps blood pressure, cholesterol and cancer
Truth , It has been theorized that garlic helps all of the above , but studies have only shown it to be effective on cholesterol only, it has in some studies there is about a  5-10 % decrease. Studies for cancer prevention and treating high blood pressure have given inconsistent results.

2) Myth You must cook your food with Garlic
Truth The protein that makes the effects of garlic , becaome inactivated by heat and activated by crushing or chewing . Therefore, only raw garlic is helpful

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http://noellicenter.blogspot.com/2010/04/garlic-truths-and-myths.html