Dietary composition may have a role in preventing weight regain after weight loss. Low carbohydrate diets have been used a lot for weight loss, but their effects in long-term weight control are controversial. Poor dietary compliance is one of the most common problems associated with these diets. They also have to be supplemented because of nutrient deficiency.[48] Soenen demonstrates that a higher protein intake, which is related to lower weight gain and lower carbohydrate intake has no additional results.[49] The relationship between more protein intake and less weight regain has been shown previously.[50]

Regaining nearly half of the lost weight after one year is usual and most of dieters acquire their first weight within three to five years.[2] Experts believe that if a person sustains even 5-10% of his / her weight loss, it is considered a great achievement.[3] Actually weight maintenance is defined as weight change up to 3% of the actual body weight after weight loss.[4]
To splurge or not to splurge? That is the perennial weight-loss question. Should you allow for occasional indulgences in your healthy-eating program, or say a firm “no” out of fear they will sabotage your results? Once you start a new regimen, it can be scary to stray from it. So how can you navigate the path of progress without veering into perfectionism? Here’s some professional counsel. 
Watching the scale will also help you calibrate your diet again. You won't be eating quite the same way when you're trying to maintain a stable body mass, since your focus isn't creating a calorie deficit but maintaining a healthy level of calories each day. Your nutritionist and personal trainer can help you with this. Even if you're going it alone, slight eating habit alterations will show up during your weekly weigh-in.
Better Breathing – Sleep apnea and other breathing irregularities are more common among obese patients than seen in the general population.  Asthma also occurs more frequently among overweight patients. Treatment is also compromised by obesity, because some studies suggest that the steroids used to ease symptoms are not as effective when used by obese patients.

Whether more dairy intake is a predictor of successful weight maintenance, is unclear.[33] Food variety is evaluated by virtue of the dietary diversity score (DDS).[53] Some studies declare that lower DDS[54,55,56] is related to lower body mass index (BMI); just one study has shown that their association is inverse.[57,58] As energy intake increases along with DDS,[59] the lower food group variety causes lower energy intake;[34] so it is essential to eat just a special kind of food. Dietary habits that can help obese persons to keep their lost weight are self-efficiency, cognitive control, monitoring weight, correct dietary choices, high levels of physical activity, eating more low calorie-dense foods, and lower portion size.[6,7,28,29,30,32] Unfortunately, most of the individuals who have lost weight successfully, give up healthy behaviors after the weight loss period.[12] Although the special foods do not have a confirmed role in weight maintenance, other foods with a high amount of isoflavones may be effective in weight maintenance. Soy products are foods with a high amount of isoflavones.[60,61,62,63] However, we have not documented researches in this field. Therefore, it is suggested to be considered in future researches. Some specific behavior also may be effective in weight maintenance. Previous publications have shown that sleep deprivation may be associated with obesity and central adiposity.[64] Therefore, whether or not sleep duration is related to weight maintenance needs to be made clear in the future. Other behaviors also need to be assessed in this regard.
The first output will be your BMI (Body Mass Index). Your BMI is commonly used to determine if you are overweight for your height and this will let you see which weight category you currently fit into. You can then see an estimate of your Basal Metabolic Rate (BMR). Your BMR can be defined as your Calorie expenditure while at rest in a neutrally temperate environment, in the post-absorptive state. There is no need to understand these terms, but rather can be viewed as how many Calories you burn a day with no real activity or digestion occurring.
Remember: All foods, including "healthful foods," should be consumed in moderation, and distinctions can often be misleading since even natural foods like fruits can have large amounts of sugar, and foods labeled as "health foods" such as low-calorie foods, reduced-fat foods, etc. can potentially replace one unhealthy component with another. Many reduced-fat foods for example have large amounts of added sugar to compensate for taste lost through fat reduction. It is important to pay attention to, and consider the different components in a food product in order to determine whether said food deserves a place within your diet.
“Stepping on the scale frequently makes you aware of small changes and helps you quickly react to those changes. The National Weight Control Registry, a large group of people who have successfully lost at least 30 pounds and kept it off for 5 years, found that successful ‘losers’ weigh themselves often and make adjustments accordingly. When you begin to understand that sodium, carb intake, hormones and alcohol intake can impact weight and that it isn’t possible to gain 2 pounds of fat overnight, you will begin to better understand your body. The key is to pay attention to overall trends; don’t obsess over day-to-day numbers! — Jennifer McDaniel, MS, RDN, CSSD, LD, food and nutrition expert

To prep his patients for success, Dr. Seltzer tells them to plan around a large evening meal by eating a lighter breakfast and lunch—NBD since most people who eat a meal before bed tend to wake up feeling relatively full, he says. Research suggests balanced bedtime meals may also promote steady next-day blood sugar levels, which also helps with appetite regulation.