Nutrition is a science that examines the relationship between diet and health. Dietitians are health professionals who specialize in this area of study, and are trained to provide safe, evidence-based dietary advice and interventions.Deficiencies, excesses and imbalances in diet can produce negative impacts on health, which may lead to diseases such as cardiovascular disease, diabetes, scurvy, obesity or osteoporosis.Many common threats and their symptoms can often be prevented or alleviated with better nutrition. The science of nutrition attempts to understand how and why specific dietary aspects influence health.

One of the most common food choices for the average person is fast food. And, as if this is going to be a shock to anyone on the planet, fast food is one of the worst high calorie offenders. This list is taken from the nutrition facts of literally every single item from the menus of 25 popular fast food restaurants.

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After going through the nutrition facts of every single item from the menus of 25 fast food restaurants, here's a list of the 272 highest calorie foods. A whopping 63 of them contain over 1000 calories.

After looking through the nutrition facts of literally every food from the menus of nearly 20 different fast food restaurants, here's a list of the 88 most unhealthy items.

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