Maintaining Weight after Diet: Secrets You Need to Know

Maintaining Weight loss after a diet is the most significant challenge facing all dieters today. The outdated concept that “eating healthy” and “exercise” are the keys to weight maintenance following a weight loss plan may sound good, but sadly not very successful. 90% of dieters who lose 20 lbs. over a year will regain the weight in the following 24  months. In fact, it takes multiple attempts at weight loss even to lose the 20 lbs. in the first place.

In a meta-analysis of 29 long-term weight loss studies, more than half of the lost weight was regained within two years, and by five years more than 80% of lost weight was regained . Indeed, previous failed attempts at achieving durable weight loss may have contributed to the recent decrease in the percentage of people with obesity who are trying to lose weight

What is Successful Weight Loss?

Successful weight loss is keeping at least 10% of your body weight off for at least one year. This definition differs from the FDA’s statement, which states that an effective weight loss drug only has to produce a 5% loss. Many researchers find that only 10-20% of overweight individuals are able to obtain the goal of “successful weight loss”. This occurs no matter what diet or exercise plan is employed. 

Regaining weight after weight loss is seen in the figure below adapted from Sumithran, P et al from the New England Journal Of Medicine (2011:365:1597-1604). It shows the slow increase of weight following 10 weeks of diet and weight loss despite eating calories calculated for weight maintenance.

Regain Weight After Dieting


Reduction in Metabolism and Increased Hunger:  Main Determinants of Weight Regain after Dieting

Maintaining Weight loss after a diet is more difficult in families with a high degree of obesity. In most adults, body weight is constant over long periods of time despite changes in both food intake and exercise. This suggests that our body weight is controlled by many factors beyond most people’s control. This makes maintaining weight loss challenging. Despite eating more than 1 million calories a year, the balance of calories in and out varies no more than 1% over the year. The control mechanisms for body weight that regulate our ability to lose and even more important maintain our weight are based on inherited factors based down from past generations as well as environment influences. All of these converge in a family where both parents and several children are overweight.

Most individuals who have lost weight and only to regain it know it’s easier to lose weight than to keep it off. Why is this so difficult? it’s due to the fact that as one loses weight there is a decrease in metabolism and energy expenditures to values below what one might suspect from the actual weight.

Part of this is due to the reduction in muscle mass seen with weight loss. This is also the explanation for the weight gain with aging. Everyone loses muscle and bone mass as they age. This is one of the causes of plateaus in all weight loss programs. However, this metabolism reduction is still not enough to explain the easy and quick weight regain often to levels about the starting weight as well as the reason for weight loss plateaus after losing 15-20 lbs.

Typical Weight Loss Plateau in a Diet Program

Weight Loss Plateau Graph

Reduced metabolism that characterizes plateaus and weight maintenance is accompanied by increase hunger. Fullness is often hard to achieve after weight loss. People tell me all day how hungry they are after they have attained their weight loss goals. Other issues contributing to weight loss plateaus include gradual weight regain after a weight loss programs and the fact that calories burned with any movement are very dependent on body weight.

Here are the reasons for weight loss plateaus and the difficulty maintaining weight loss after a diet plan:

  1. Reduced metabolism–occurs during dieting and persists for months after the weight loss!
  2. Increased hunger–occurs during all weight loss programs
  3. Boredom after weight lossoften interferes with all attempts at weight loss
  4. Reduction in calories burned during physical activity-due to fact that most exercise is weight dependent

Why Weight is Regained after Weight Loss: Marked Increase in Hunger After Weight Loss Program

The reason why 90% of dieters regain their weight within a year is not the result of a lack of willpower, but the fact that hunger is increased during and after weight loss. These changes continue for several years after, during which time the body tries to regain it’s lost weight. Studies have shown that this is due to a rise in the levels the hormones and chemicals causing hunger including Grehlin, and gastric inhibitor polypeptide.

The graph below clearly illustrates the changes in hunger perception during and after weight loss found in the studies of Dr. Sumithran and colleagues. They evaluated hunger before and during a weight loss program and during the maintenance phase by providing a standardized meal and measuring the degree of hunger reported by the subjects over the following six hours.

In the graph, the solid black dots illustrate the hunger patterns for four hours after eating a standard meal before the weight loss. Hunger starts off at 32, drops 30 minutes after eating to almost zero, then gradually increases over the next 120 to 240 minutes, ultimately reaching levels experienced before the meal.

Increased Hunger Persists for More than a Year After Weight Loss

Hunger is increased after weight loss

For subjects on their 10th week of the diet, the clear boxes show increased hunger before the meal (as would be expected) which persisted for four hours after the meal. The triangles show an increased hunger pattern before and after a meal when the subject returned to “normal eating” a year after the weight loss. These values are similar to the hunger patterns seen during the dietary phase.

This pattern of increased hunger after completing a weight loss program may be one of the reasons for the common difficulty of maintaining weight loss after most diets, as well as the need for continued treatment after the initial weight loss—either surgical or with medication.


6 Secrets to Maintain Weight Loss After a Diet

Regaining weight after a diet is the most common response following a “successful” diet. This is caused by a compensatory slowing of the metabolism and an increase in hunger during the diet that can persist after the initial weight loss. The progressive slowing of metabolism occurs no matter how the weight loss was produced–traditional calorie restricted diets, low carb, high or low fat foods, medication, and even gastric bypass. It occurs with or without exercise and in the face of maintaining limited calories after the initial dietary period. A recent report showed that 1/3 or more of the “Biggest Losers” on NBC-TV regained their weight.

  1. Intermittent Fasting(16:8) Plan- Every Monday morning.  This is a simple plan to fast from Sunday evening until the next day. By adding MCT oil the ketosis and fat burning is enhanced. Depending upon gender, age and weight, most people can lose from 1/4 to 3/4 of a pound for each fasting day a week. Considering you are only eliminating a single breakfast  meal, its a simple system.
  2. Tapering Appetite Suppressors: If you have used appetite suppressors such as phentermine or diethylproprion or metabolic boosters to lose weight, taper them slowly over a3 month period to give your metabolism a chance to recover. This is best done by cutting the pills initially to 1/2 the dose for the first month and then slowly cut dose  for the next 3 months by focusing on the weekends and in the evening. I  suggest 1/2 phentermine at 4 pm -3 times a week 3 months.
  3. Adding Plenity to Stop Cravings and Reduce Snacking
  4. Eliminating the Food/Beverage causes of weight gain:
    1. Drinks with sugar– juices, sodas, some health and sports drinks
    2. Fast food–burgers and fries
    3. Two large meals in 1 day
    4. Wrong breakfast
    5. Bad snacks
    6. Too many carbs
    7. Condiments such as salad dressing, Mayo, oils
    8. Alcohol
  5. Seeking Foods with Easy portion Control.
  6. Increase physical activity: Clearly the most important factor preventing weight regain after a weight loss program.
    Goal is to burn 300-400 calories 3-4 times a week.



Summary of Causes of Weight Loss Plateaus and What You Can Do About It:

Weight Loss Plateau Chart

Read more About How Successful Dieters are Maintaining Weight Loss – From REAL Weight Loss Maintainers Dr. Lipman has Treated.