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Remember when low-fat diets were the rage? Now fats — or some of them, anyway — are considered crucial to a healthy diet. The fact is that recent years have seen dramatic changes in which foods dietary science considers good for you and which it doesn’t.

Whether you’ve lived here for 10 years or are just passing through, you know Las Vegas gets hot—triple-digit-degrees-for-weeks hot. If you’re new here, you might not know how important it is to stay hydrated during summer and how easy it is to become dehydrated under the scorching desert sun. Samantha Coogan, director of the didactic program in nutrition and dietetics at UNLV, shares the best ways to stay cool, hydrated and healthy.

Those who have lived in Las Vegas long enough know the drill during the extreme heat of the summer: hydrate, hydrate, hydrate.