For the past two decades, medical studies have shown that saturated fats (found in animals and full-fat dairy products) are major contributors to the onset of heart diseases.

Moreover, national guidelines have also presented that a majority of fat intake is from unsaturated (fish and plants) and only small amount of it is taken from saturated sources. But recently a study published in the Annals of Internal Medicine has unveiled that their findings do not clearly support the guidelines.

The study has been based on the assessment of 72 studies on fat intake. Researchers looked at different fats and risks associated with them. They also compared people included in the top third of fat eaters with people in the bottom third.

After comparing them, it was found that trans fatty acids were linked with an increased risk of heart disease. The study does not indicate that one can eat more amount of saturated fats that being currently recommended.

It suggests that saturated fats may not be that responsible for heart disease as they were earlier considered. Sugar and refined starch are also now known to cause heart damage through obesity. Moreover, there is no evidence saying low-fat diet is good for health.

It can be said that it is a high time now to rethink about whole diet. Dr. David Katz has overviewed diet in The Annual Review of Public Health said people should 'food, not too much, mainly plants'.

The healthiest diet include things like vegetables, fruits, nuts, beans and seeds and some amount of fish, meat, eggs and dairy. Wholesome meal is the best meal to have, said experts.