Adults should not have more than 30 grams of sugar per day. Eating too much sugar is lethal to the heart and subsequently to life. A sugar coated diet will definitely pose a threat for the heart, say several research studies.
A study done for over 15 years, found that those who had sugar 25% or more of their daily calories were twice as likely to die from heart complications than those who had less sugar.
Added sugar, which are found in sodas, bottled drinks, pastries and cakes, are the biggest threat to heart.