Category: Weight Loss

Could water fasting increase weight loss and how many days consuming nothing but water is safe?

Water fasting is a type of diet plan undertaken by people who want to lose more weight quickly.

A water fast can last for five days or more and during this period a person will eat nothing but drink water and natural zero calorie beverages.

Scientists have reviewed the evidence for water fasting and Buchinger fasting, a medically supervised diet therapy consisting of taking very little food for several days to almost three weeks.

The research reveals that fasting for five to 20 days increases ketones production due to the body breaking down fat for energy, and promotes weight loss up to ten percent of body weight.

However, four months after the fast ends, the metabolic benefits such as reduced blood pressure, reduced LDL (bad) cholesterol and triglycerides, improved insulin sensitivity and blood sugar levels seem to fade.

The adverse effects were metabolic acidosis (too much acid in the body), insomnia, hunger, and headaches.

Otherwise, a water fast or a similar diet therapy where a person consumes very few calories daily did not cause any severe injury.

Professor Krista Varady, the study’s lead author, said:

“My overall conclusion is that I guess you could try it, but it just seems like a lot of work, and all those metabolic benefits disappear.”

Five days maximum

However, Professor Varady advised that without medical supervision, people should not use these type of fasts for more than five days.

The review analysed eight studies on prolonged water fasting or Buchinger fasting where fasters under medical supervision consume a tiny amount of vegetable soup, juice, tea, and water.

The findings show that the weight loss effect after a short period of time was visible.

In five days participants lost four to six percent of their weight, those on seven to 10 days fasting lost between two to 10 percent, and those on 15 to 20 days fasting slimmed down by seven to 10 percent.

After the fasting period was over, participants maintained their weight loss if they followed a restrictive calorie intake, otherwise in three months they gained the weight back.

About one-third of the weight loss was fat mass and two-thirds was lean mass suggesting that extreme fasts cause people to lose more muscle than body fat.

Professor Varady said:

“Your body needs a constant intake of protein.

If it doesn’t have that, then it draws from muscles.”

Professor Varady added she prefers those who want to lose weight to consider intermittent fasting instead of water fasting,

“Because there’s a lot more data to show it can help with weight management.”

Related

• Portion control is a better strategy for weight management than intermittent fasting.
• Continuous dieting and intermittent fasting lead to the same amount of weight loss.
• Mediterranean, low-carb, low-fat, or intermittent fasting, dieters lose the same amount of weight.
• The 16:8 diet is an effective way to lose weight.
• A 14-day break from dieting helps increase weight loss by 50 percent.
• Alternate day fasting and the 5:2 diet are more effective than time-restricted eating.

The study was published in the journal Nutrition Reviews (Ezpeleta et al., 2023).

Fewer small meals or intermittent fasting, which is more effective for losing weight?

Portion control or simply eating fewer calories appears to be a better strategy for weight management than intermittent fasting.

Eating less frequently and having smaller meals each day will strongly influence weight loss compared to fasting for a certain number of hours a day, a study has found.

Some studies have suggested that time‐restricted eating, also known as intermittent fasting, can boost circadian rhythms and energy metabolism.

However, the current study didn’t find that limiting meals for a specific period of time can helped anybody lose weight in the long run.

The research team examined the relationship between time from first to last meal with weight change.

For this study, 550 obese adults were enrolled, of which 80 percent were white, most participants had a college or higher degree.

The follow-up period was 6 years.

They used a mobile application to report eating, sleeping, and wake up time across 24 hours.

This information allowed the team to calculate the interval from waking to first meal, between meals, and from the last meal to sleep.

Summary of findings

• Meal timing had no effect on weight change over the long-term.
• Total daily number of large meals (more than 1,000 calories) was linked to weight gain over the six-year follow up.
• Total daily number of medium meals (between 500 to 1000 calories) was associated with weight gain over follow‐up time.
• However, fewer small meals (less than 500 calories) was linked to weight loss over the follow-up period.
• The time intervals from being awake to first meal was 1.6 hours, from first to last meal was 11.5 hours, and from last meal to sleep was 4 hours.
• Sleep duration on average made up 7.5 hours of the 24-hour window each day.
• The greatest risk factors for weight change were daily calorie intake and meal frequency rather than meal timing.

Data suggests that nearly 70 percent of Americans are either overweight or obese, a serious risk factor for cardiovascular disease and diabetes.

Therefore, improving diet and lifestyle, including eating healthy foods, lower calorie intake, smaller sized meals, more physical activity, less stress, and better sleep can help people to battle obesity.

According to the American Heart Association, irregular eating patterns and changing meal frequency are not favourable for weight control and heart health.

The study was published in the Journal of the American Heart Association (Zhao et al., 2023).

The daily amount of Ozempic that lowers blood sugar and increases weight loss.

People with type 2 prediabetes don’t respond to insulin and as the condition progresses, lowering blood glucose and losing weight becomes difficult.

A healthy diet and exercise could certainly reduce the risk of diabetes but when it comes to medication there are many ups and downs.

Semaglutide (marketed as Wegovy, Rybelsus and Ozempic) is a glucagon-like peptide-1 (GLP-1) receptor agonist that causes the body to produce more insulin.

The drug has been found to help diabetic patients in losing weight as well as reducing blood sugar levels.

While the drug keeps gaining attention, the effective dosage of oral semaglutide has been challenged.

Semaglutide dosage study

A study compared the effectiveness of the currently approved 14 milligrams (mg) dose in adults with 25 mg, or 50 mg per day for 52 weeks.

The results showed that taking a 25 mg or 50 mg semaglutide tablet once a day is superior to the 14 mg dosage in reducing blood sugar levels and in increasing weight loss.

At the end of study period, participants who were on 50 mg of oral semaglutide had lost 17.5 pounds (8 kg), those on 25 mg had lost 14.8 pounds (6.7 kg), and those on 14 mg had lost 10 pounds (4.5 kg).

Semaglutide suppresses appetite so as the dosage increases there will be less desire for eating which results in losing more weight.

Professor John Buse, the study’s lead author, said:

“Low doses of GLP-1 receptor agonists are really powerful for reducing A1C, or the average glucose in the blood.

Whereas, the higher doses that are really good for weight reduction.

On average, patients lost eight kilograms (17.5 lbs) at 50 milligrams, which is nearly twice as much weight loss that we saw with the lowest dose.”

The common side effects for semaglutide are nausea, vomiting, diarrhoea, or constipation which occurred more often with taking daily dosages of 25 mg or 50 mg.

The trial involved more than 1,600 adults with type 2 diabetes who were randomly divided into three groups by the daily dosage of oral semaglutide; 14 mg, 25 mg, and 50 mg.

The haemoglobin A1c (HbA1c) test reflects blood glucose levels and the A1c for adults with diabetes is suggested to be below 7 percent.

In this study, participants A1c levels were between 8 to 10.5 percent.

They found that those who received either 25 mg or 50 mg of oral semaglutide were more likely to reach the goal (A1c level of below 7 percent).

Related

• Weekly injections of semaglutide reduces body weight by more than 20 percent.
• Injection of 2.4 mg of semaglutide with a low-calorie diet can lead to a weight loss of 37 lb.
• Glucagon-like peptide (GLP-1) drugs treat obesity and may help to destroy cancer cells.

The study was published in the The Lancet (Aroda et al., 2023).

This diet is a very effective weight loss strategy for diabetic patients and those with prediabetes.

People with type 2 diabetes are often obese or overweight and have high blood pressure.

However, to combat this metabolic syndrome, the first step is to lose weight.

There are several effective diet plans to help people with this condition but what dieting strategy works best remains unclear.

A study on adults with type 2 diabetes has found that time restricted eating (TRE) is more effective than the daily calorie restriction (CR) strategy.

TRE is a type of intermittent fasting that only allows an eating window of 8 to 12 hours and water fasting during the remaining hours each day.

The TRE group in this study were allowed to eat between noon to 8pm while the other group followed the CR approach.

Participants on the TRE regime lost more weight and body fat, and saw an increase in HDL (good cholesterol) compared to those who ate fewer calories.

However, blood sugar levels were similarly improved in both groups.

Ms Vicky Pavlou who presented this research at the annual meeting of the American Society for Nutrition, said:

“Many people find counting calories very hard to stick to in the long term, but our study shows that watching the clock may offer a simple way to decrease calories and lose weight.

Although time-restricted eating is becoming increasingly popular, no other studies have looked at an eight-hour eating window in people with type 2 diabetes.”

Professor Krista Varady and the team wanted to know if diabetic people would gain more benefits from the TRE strategy than the CR diet plan.

57 overweight and obese adults with type 2 diabetes were divided into calorie restriction, time-restricted eating, and control groups.

The TRE group were allowed to eat for 8 hours (noon to 8 p.m.), the CR group could eat at any time but counted their daily calorie intake, but the control group could eat whenever and as much as they liked.

When compared with the control and the CR groups over six months, participants on the TRE diet lost about 4 percent of their weight, equivalent of losing 5 kg for a person weighing 125 kg.

Haemoglobin A1c (HbA1c) levels were tested for blood sugar, the normal range is 4 to 5.6 percent but the levels in people with diabetes were 6.5 percent.

The results show that the HbA1c levels for the TRE group reduced by 0.91 percent and for the CR group by 0.95 percent.

To see any improvement in cardiometabolic risk factors a minimum 5 percent weight loss is required.

Since this was not achieved, the team could not assess them.

Ms Pavlou added:

“Our study shows that time-restricted eating can be a good alternative for those with type 2 diabetes who want to lose weight and improve their blood sugar.

However, there are multiple types of medications for those with type 2 diabetes, some of which can cause low blood sugar and some that need to be taken with food.

Therefore, it is important to work closely with a dietitian or doctor when implementing this dieting approach.”

Related

• Intermittent fasting causes mild to moderate weight loss.
• A 14-day break from dieting increases weight loss by 50%.
• Intermittent fasting can lead to the same amount of weight loss as regular calorie restriction.
• Continuous dieting and intermittent fasting weight loss techniques are equally effective.

The study was presented at the annual meeting of the American Society for Nutrition in Boston (Pavlou et al., 2023).

People who consume their daily calories in this way can double weight loss.

Eating high quality proteins like eggs, Greek yogurt and lean meats for breakfast can boost weight loss, research finds.

Having more calories for breakfast has even been linked to more than doubling weight loss, one study has found.

Consuming more calories at breakfast is linked to a greater chance of losing weight and reducing the waistline.

Even having a desert at breakfast, such as a cookie or piece of chocolate cake, was linked by the previous study to lower levels of insulin later on and healthier triglyceride levels.

In general, people who consume their daily calories earlier in the day can double weight loss.

Despite this, more than half of young people skip breakfast, researchers find.

This is what inspired Dr Heather Leidy, co-author of the current study:

“This study examined if the type of breakfast consumed can improve weight management in young people who habitually skip breakfast.

Generally, people establish eating behaviors during their teen years.

If teens are able to develop good eating habits now, such as eating breakfast, it’s likely to continue the rest of their lives.”

The study included 28 overweight teens, half of whom were fed a high-protein breakfast (35g) and half a normal-protein breakfast (13g).

Normal protein breakfasts involved milk and cereal while high-protein breakfasts included eggs, dairy and lean pork.

All the teenagers in the study reported skipping breakfast almost every day of the week.

Dr Leidy explained the results:

“The group of teens who ate high-protein breakfasts reduced their daily food intake by 400 calories and lost body fat mass, while the groups who ate normal-protein breakfast or continued to skip breakfast gained additional body fat.

These results show that when individuals eat a high-protein breakfast, they voluntarily consume less food the rest of the day. In addition, teens who ate high-protein breakfast had more stable glucose levels than the other groups.”

The study was published in the International Journal of Obesity (Bauer et al., 2015).

People in the studies lost weight without dieting or changing their lifestyle.

Eating beans, peas, lentils and chickpeas all help people lose weight, a review of the research finds.

People in the studies lost weight by adding a single daily serving of these foods, without making any other changes to their diet or lifestyle.

In other words, they did not reduce their calorie intake, skip meals or track what they ate.

They just added around three-quarters of a cup of these foods to what they normally ate each day.

The group of foods, known as pulses, are effective because they increase feelings of fullness by 31%, studies show.

Other pulses include:

• Runner beans,
• black-eyed peas,
• broad beans,
• kidney beans,
• and butter beans.

Dr Russell de Souza, who led the Canadian study, said:

“Despite their known health benefits, only 13 per cent of Canadians eat pulses on any given day and most do not eat the full serving.

So there is room for most of us to incorporate dietary pulses in our diet and realize potential weight management benefits.”

The research analysed the results of 21 separate clinical trials.

The combined results showed that people lost an average of a half-a-pound in six weeks, without dieting.

Pulses have a low glycemic index, meaning the body takes a while to break them down.

This helps people feel more full, said Dr de Souza:

“This new study fits well with our previous work, which found that pulses increased the feeling of fullness by 31 per cent, which may indeed result in less food intake.”

Pulses have the added benefit of reducing the levels of bad cholesterol in the body by around 5 percent.

They also lower the risk of cardiovascular disease.

Dr de Souza said:

“Though the weight loss was small, our findings suggest that simply including pulses in your diet may help you lose weight, and we think more importantly, prevent you from gaining it back after you lose it.”

The study was published in the American Journal of Clinical Nutrition (Kim et al., 2016).

The simple diet change to help you lose belly fat and improve health.

A higher intake of fibre and lower intake of saturated fats can help to lower belly fat, research concludes.

Belly fat is the fat that surrounds the vital organs, deep in the belly.

Unfortunately, there is no miracle food that can reduce belly fat on its own.

However, eating a heart-healthy diet high in fibre can help to reduce abdominal fat.

Soluble fibre, such as that in fruit and vegetables, turns to a gel during digestion.

This helps people feel more full and may also lower blood sugar levels and help bowel movements.

Dr Kari D. Pilolla, the study’s author, writes:

“…research has shown that dietary trans and saturated fats are positively associated with abdominal obesity, whereas fiber, especially soluble, is negatively associated.

Thus, a great start to preventing and reducing abdominal obesity is to follow a diet that encourages foods high
in fiber such as vegetables, fruits, legumes, and whole grains and limits foods high in trans and saturated fats, such as fatty meats, baked goods, and highly processed foods.”

Over 50 percent of Americans are thought to be abdominally obese.

High levels of belly fat are linked to fatty diabetes, liver disease and high blood pressure.

Abdominal obesity raises the risks of a variety of disease, said Dr Pilolla:

“Independent of body weight, a larger waist circumference increases risk for cardiovascular disease, diabetes, and metabolic syndrome.

In fact, it has been estimated that approximately 84% of people with abdominal obesity are metabolically
unhealthy.”

The study compared the evidence for a variety of different diets, including the ‘paleo’ diet, intermittent fasting and those involving green tea.

The best evidence that is currently available in terms of fighting obesity supports two diets:

• the Dietary Approaches to Stop Hypertension (DASH) diet,
• and a Mediterranean-style diet.

Here are ten typical ingredients of the MedDiet:

• Green leafy vegetables,
• other vegetables,
• nuts,
• berries,
• beans,
• whole grains,
• fish,
• poultry,
• olive oil
• and wine.

The MedDiet also has relatively little red meat, little dairy and uses olive oil as the largest source of fat.

The DASH diet is reasonably straightforward and involves eating lots of fruit, vegetables and whole grains.

It also includes:

• fat-free or low-fat dairy products,
• fish,
• poultry,
• beans,
• nuts,
• and vegetable oils.

It recommends limiting intake of sugar, fatty meats, full-fat dairy, palm oil and foods high in saturated fats.

The study was published in the ACSM’s Health & Fitness Journal. (Pilolla et al., 2018).

The diet can lead to 5.5 more pounds of weight loss.

Vegetarian diets produce the most weight loss, research finds.

Diets that do not contain meat are linked to significantly more weight loss.

Vegetarian dieters typically lose around 4.4 pounds more than those following diets that include meat.

A vegan diet is even more effective for losing weight, with an average weight loss of 5.5 pounds more than those eating meat.

Vegetarian diets are particularly effective for weight loss because of the high intake of fruits, whole grains and vegetables.

Vegetables and whole grains typically have a high glycaemic index, meaning they do not cause a spike in blood sugar levels.

Fruits are rich in fibre and contain many antioxidants and minerals that naturally protect the body.

Fibre helps to slow down the rate at which food leaves the stomach, which stops people from feeling hungry.

Eating more fibre is repeatedly linked to weight loss by research.

The conclusions come from a review of 12 separate studies including 1,151 participants in total.

The studies all compared people who were dieting on vegetarian diets with those dieting while still eating meat.

There are two types of vegetarian diets, the authors write:

“The two major types of vegetarian diets are the lacto-ovo-vegetarian diet, in which meats are avoided but consumption of milk and eggs is allowed, and the vegan diet, in which all products originating from animals are avoided.”

The results showed that vegetarian diets were superior for weight loss.

The study’s author explain the results:

“Vegetarian diets appeared to have significant benefits on weight reduction compared to non-vegetarian diets.

Further long-term trials are needed to investigate the effects of vegetarian diets on body weight control.”

Another study has found that vegetarian diets can double weight loss.

The study was published in the Journal of General Internal Medicine (Huang et al., 2019).

A weight loss drink that is very easy to incorporate in the daily routine.

Drinking a low-sodium vegetable juice can quadruple weight loss, research shows.

People in the study who drank one or two glasses of vegetable juice each day lost four times as much weight while dieting.

A vegetable juice could be a simple way for people to boost their intake of essential nutrients and increase weight loss.

Vegetables help with dieting because they are low in energy-density.

This means they tend to make people feel fuller and they contain more nutrients, but without containing as many calories.

Dr John Foreyt, study co-author, said:

“Making vegetable consumption easy is critical because it has so many benefits, from disease prevention to weight management.

We have a lot more work to do in finding ways for people to improve their health, but providing them with something simple like vegetable juice is a step in the right direction.”

Included in the study were 81 overweight people with metabolic syndrome.

Metabolic syndrome is a cluster of conditions including high blood sugar, blood pressure, excess body fat and abnormal cholesterol levels.

One group in the study followed the DASH diet and drank one or two servings of vegetable juice daily for 12 weeks.

The results showed that those drinking vegetable juice lost four pounds in comparison to only one pound among people who only did the DASH diet.

People drinking vegetable juice daily also had higher levels of vitamin C and potassium.

Professor Carl Keen, study co-author, said:

“This study suggests that it’s not enough to just educate people on the importance of vegetables, you need to show them ways to easily incorporate them into their daily routine.

What we found was that something as simple as drinking your vegetables can be an effective tool in achieving behavior change.”

The study was published in the Nutrition Journal (Shenoy et al., 2010).

Up to 40 percent of the population have a vitamin D deficiency.

Taking vitamin D supplements is linked to losing four times as much weight, research finds.

People who took a vitamin D supplement also doubled the number of inches by which they reduced their waistlines.

As many as 40 percent of the population have a vitamin D deficiency.

A deficiency in this vitamin has been linked to increased inflammation the body.

Foods that are rich in vitamin D include oily fish and eggs, but most people get their vitamin D from the action of sunlight on the skin.

Being deficient in vitamin D is repeatedly linked to being overweight and obese.

The conclusions come from a study of 400 obese and overweight people, all of whom had a vitamin D deficiency.

All were put on a low-calorie diet, but they were split into three groups, with each given different amounts of vitamin D supplementation.

One had none, another had 3,000 IU per day and the remainder had 800 IU per day.

After six months, the results showed that those taking the highest amount of 3,000 per day had lost 12 pounds.

Those taking 800 IU per day had lost 8 pounds and those taking none lost just 2.6 pounds.

The study’s authors explain the results:

“The present data indicate that in obese and overweight people with vitamin D deficiency, vitamin D supplementation aids weight loss and enhances the beneficial effects of a reduced-calorie diet.”

The results also revealed that vitamin D helped people lose more from their waistlines.

The group taking 3,000 IU per day lost two inches in comparison to just 1 inch in the control group.

The researchers conclude:

“All people affected by obesity should have their levels of vitamin D tested to see if they are deficient, and if so, begin taking supplements.”

The study was presented at the European Congress on Obesity, 2015 (Vigna et al., 2015).