Most people need around 1.5-2.5 litres of water per day, depending on your size and how active you are – more if you are very active or working out in heat. Of course 4-5 litres of water per day is not healthy, especially if you are also eating enough food! Cassey’s recommendations on this calendar are not unhealthy if you already drink a healthy amount of water – at most she’s recommending to drink 5 cups more than you would normally (1 US cup is – I think – about 250 ml or a quarter of a litre). I normally drink 2 litres of water a day, so following this calendar I would be drinking at most just over 3 litres. That’s not unhealthy.
Processed foods are one of the biggest sources of salt in Americans' diets—and the scary part is you probably don't even realize it. Because of the way these addictive foods are formulated, salt is hidden in everything from soups to pasta sauces to even sweet things like boxed cakes. Swap out processed foods in favor of fresh fare and your tummy will thank you. Not only will you lose the salt-bloat but you'll also lose the extra empty calories and lose weight.
Nonstarchy vegetables: Because vegetables fill you up without filling you out, they’re really the backbone to any healthy eating plan. They’re also loaded with anti-inflammatory properties to continue to banish belly fat for life. Even when you reach your goal weight, aim to have a minimum of four servings of nonstarchy vegetables every single day.
You'll find lean, satiating protein in every single bite you take on Zero Belly Diet. The muscle-building macronutrient is fundamental to the plan, and eggs happen to be one of the easiest and most versatile delivery systems in the universe. Not only that, they're also the number-one dietary source of a nutrient called choline. Choline, which is found also in lean meats, seafood, and collard greens, attacks the gene mechanism that triggers your body to store fat around your liver. (That's why eggs are one of the best foods for weight loss.) One Zero Belly Diet recipe—a breakfast hash with sweet potatoes and fresh farm eggs—became test panelist Morgan Minor's go-to breakfast, and after just three weeks on the program, the female firefighter lost 11 pounds and 4 inches from her waist! The more eggs you eat, the less egg-shaped you get.

A note on vegan/vegetarian diets: This is another topic that entire books and articles are written about, so we won’t dive into them here. Of course, it is absolutely possible to build muscle or lose fat on a vegan/vegetarian diet. Certainly you can get to a flat stomach, you just need to be diligent with your calorie tracking and macros, like we recommend you do above.


It’s not just about weight loss. Having great gut health is linked to good health throughout your body. Scientists in this rapidly growing field are finding connections between gut microbes and the  immune system, weight loss, gastrointestinal health, , allergies, asthma, and even cancer. With every study that’s published, scientists become more convinced that having a healthy gut leads to having a healthy body.
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