Fasting is an age-old practice that is often carried out for religious reasons. But these days, when people have become more concerned about their weight, fasting is more often practiced to lose weight, than for religious reasons. During fasting, people eat little to no food. It is true that fasting results in weight loss but there are also some negative effects for the same.
You may be tempted to reach for the meds, but medicating with vitamins from whole foods—blueberries in particular—is a much better, all-natural option to perk-up a compromised immune system. In fact, you can think of each sweet little blueberry as a pill that’ll make you feel a whole lot better. Oregon State University recently took a look at over 400 compounds for their ability to boost the immune system, and the study revealed blueberries as a standout due to a compound called pterostilbene. Goodbye Pepto Bismol, hello Pterostilbene! Bored with plain blueberries? Try any of our 50 Best Snacks for Weight Loss for nourishing eats that are also delicious.

Sorry, kitchen’s closed (for 12 to 15 hours since you last ate). Nighttime fasting—or reducing your “eating window”—may help to reset your metabolism and burn the extra glucose in your system after a period of overindulgence, according to researchers at the Salk Institute for Biological Studies. The scientists fed adult mice one of four diets—some high in sugar, some high in fat, some both. And each of the four diets contained the same number of calories. From there, mice in each diet group were then given set times to eat. Some could eat whenever they wanted, others were restricted to feeding times of 9, 12 or 15 hours a day. Regardless of what kind of diet they ate, and regardless of the fact that they ate the same number of calories, mice in the 9-hour and 12-hour groups remained healthy, while all of the mice in the 15-hour group became obese.
Whether a regimen calls for two fasting days a week or eating your meals in a smaller "window" of time in the day, all plans share a near-freedom from calorie counting, a big plus for weary food diarists. Once you have planned your fasting-period menu—say, a 500-calorie day of chicken and veggies—you're set. And in your nonfasting periods, you eat normal, healthy meals (even that steak!) without worrying about every bite.

Secondly, another concern that people have about fasting is the hunger that one might experience. Interestingly, when comparing intermittent fasting versus calorie restriction, is has been noted that the hunger response is more pronounced when on a calorically restricted diet than in fasting (5).  In a 10-week study done on alternate day fasting for weight loss, it was found that after 2 weeks, the hunger response decreased significantly and continued to stay low (2).
While smoothies can be a healthy meal or snack, it all comes down to portion control. A recipe that calls for a banana, a cup or more of berries, a cup of yogurt, and a splash of milk and/or juice is going to rack up the calories and sugar, says Ansel. (But smoothies don’t always have to be calorie bombs. Try these 20 healthy, protein-packed smoothie recipes.)

What makes Runa Clean Energy special is guayusa, a plant native to the Amazon rainforest with double the antioxidant capacity as green tea, according to a report in the Journal of Ethnopharmacology. Legend has it, indigenous hunters nicknamed the leaf “night watchman” for its ability to heighten awareness and prevent sleep. With as much caffeine as coffee, guayusa is also a rich source of theanine, an amino acid that researchers say can work in synergy with caffeine to calm and focus the brain.The result? A jolt of energy without the jitters. In other words: clean energy.
The SHRED Power Cleanse If you have two weeks to commit, this program by Dr. Ian a great one to consider. Why? Because it's filled with whole, nutritious, fiber-rich foods, a common sense approach to eating and an exercise program that is based on smart science. It is not designed to be a weight loss program, but you're likely to lose weight while you're on it. And during the program, you learn healthy lifestyle habits (like planning ahead and journaling) that you can use for long-term weight loss and weight maintenance. 
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