Any healthy adult can do intermittent fasting. However, a health professional should be consulted before beginning any change in the diet, especially for pregnant or lactating women, people who take medication or have any health problems in general.

In the VIVRI Challenge, Essential Nutrition is obtained at the traditional breakfast, lunch and dinner hours. In VIVRI Intermittent Fasting the same Essential Nutrition is received for a more compact period of time (8 continuous hours). It is up to each person, and the recommendation of their health professional, to choose which option best suits their lifestyle.

Yes, the scientific community ranks the Keto diet as the least healthy diet that exists and warns that it can cause serious damage to your health. In addition, the Keto diet statistically increases the percentage of body fat even in those who lose weight; and generates weight-regain. On the other hand, intermittent fasting is considered safe and sustainable in the short, medium and long term by the medical community since it includes all the essential nutrients in a balanced way, with three meals a day. Furthermore, it is much easier and more practical to follow, and it does not generate weight-regain.

It is recommended to maintain good hydration, mainly with natural water. You can also incorporate other natural drinks without calories, such as your favorite natural teas or black coffee (unsweetened and without milk in all cases).

It is recommended not to exceed 2,000 calories, or the calories you burn daily according to your activity rhythm, and always follow the VIVRI Intermittent Fasting Guide.

Follow your VIVRI Intermittent Fasting Guide to learn about the most (and least) recommended foods.

If this happens, you should reset your schedule, first complying with the 16-hour fast and then cutting short the next meal period. For example, if your normal lunch period is from 12 pm to 8 pm, but you had dinner one day an hour later (9:00 pm), then have your breakfast an hour later the next day (at 1 pm) and follow your meals until 8:00 pm, which is an irregular period of 7 hours (instead of 8) that allows you to reestablish your Intermittent Fasting schedule.

Yes, simply skipping breakfast is considered unhealthy, and it frequently results in overeating and eating poor quality foods, as well as slowing down your metabolism. However, in VIVRI Intermittent Fasting you do not skip any meal of the day. You simply have your three meals (breakfast, lunch and dinner) within the 8-hour period, obtaining all the nutrients that your body needs. Thereby leaving enough time for Autophagy (a discovery that resulted in the 2016 Nobel Prize in Medicine). Think about it, when you break the fast with your Shake Me!, regardless of what time it is, you are literally going to break-fast.

Yes. An advantage of exercising in the fasting period is that stored carbohydrates, known as glycogen, are likely to be depleted, so you will burn fat to fuel your workout. If you start to feel weak or dizzy, you may have low blood sugar or be dehydrated. Opt for a calorie-free electrolyte drink with no added sugars and no artificial sweeteners. Remember to listen to your body.

Direct your additional questions to a VIVRI representative by writing to: intermittentfasting@vivri.com or contacting them through our social networks.