During the first week of a reduced calorie and carbohydrate diet, you will flush a lot of excess water and lose weight rapidly. This is neither unhealthy, nor an indication of what your rate of weight loss will be like during weeks 2 and 3. With that said, men should expect to see an 8 to 12 pound loss during these 3 weeks, and women will likely lose 5 to 10 pounds. 
There’s more: According to a 2017 review that looked at and analyzed more than 70 studies of over one million people, 42 percent of adults reported having tried to lose weight some time in the previous 12 months. So, lots of people are trying to lose weight, and lots of people are gaining it back. But we also all know someone (or several someones) who have lost weight and kept it off. So, what gives?
If you’ve been eating fast food for years, get real about your approach: You’re probably not going to stick to an organic, gluten-free, paleo overhaul for very long. "You want to change as little as possible to create calorie deficit," says Dr. Seltzer, who insists the best way to support sustainable weight loss is to incorporate small changes into existing habits. So instead of giving up your daily BLT bagels in favor of an egg-white wrap, try ordering your sandwich on a lighter English muffin. Or say you eat a snack bar every afternoon: Swap your 300-calorie bar for a 150-calorie alternative. "Your brain will feel the same way about it, so you won’t feel deprived," he says.
1. The side plank exercise is the best way to reduce belly fat. There are only two points of contact with the floor which helps the core muscles to contract even harder. Lie on your side with your legs top of each other, rest on your lower forearm that is bent on the elbow. Force your upper body off the floor by using your forearm and place other hand on your hips. You should resemble a diagonal line from head to toe. After you lift your bodies just hold it for 30-60 seconds.
Harvie, M. N., Pegington, M., Mattson, M. P., Frystyk, J., Dillon, B., Evans, G., … Howell, A. (2011, May). The effects of intermittent or continuous energy restriction on weight loss and metabolic disease risk markers: A randomized trial in young overweight women. International Journal of Obesity (London), 35(5), 714–727. Retrieved from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3017674/
Most people who want to lose weight have more than 12 pounds to lose. That’s why even the best weight loss drug in the world can only be an optional complement to other treatment. That’s why this piece of advice is number 18 out of 18. It may be a helpful addition for some people, but the advice higher on the list is what can make the biggest difference, by far.
"If your diet consists of lots of sports drinks, sugar-sweetened drinks like fizzy pop and flavoured waters, or sugary foods like chocolate and cakes, it will make losing weight harder. While whole fruits and vegetables are undoubtedly good for you, they can also sometimes cause weight gain if you eat too much, as they have high levels of natural sugars in them. Low-fat food options might have high amounts of added sugar in there too, so make sure to check the food label.