How weight loss works

The science

Buy weight loss tablets online uk. In some respects, it seems quite simple. Your weight depends on how much energy you take in (the calories in food and drink) and how much energy your body uses up (burns):

• If the amount of calories that you eat equals the amount of energy that your body uses up then your weight remains stable.
• If you eat more calories than you use up, you put on weight. The extra (or excess) energy is converted into fat and stored in your body.
• If you eat fewer calories than you use up, you lose weight. Your body has to tap into its fat stores to obtain the extra energy it needs.

So, to lose weight, you need a calorie deficit. You can achieve this calorie deficit by: Buy weight loss tablets online uk.

• Eating less (taking in fewer calories from food).
• Doing more physical activity (using up more calories).

However, there is now research that shows that this explanation, sometimes called the calories-in/calories-out model, is outdated. There are lots of ways that the different parts of the body communicate with each other to keep body weight the same. There are nerve connections between the stomach and the brain. There are also several hormones involved, including insulin, ghrelin and leptin. The medical term for this is homeostatic feedback. For example: Buy weight loss tablets online uk.

• If you eat fewer calories, not only does this make you hungry but it also reduces the amount of energy that your body uses, ie eating less makes you less active.
• If you exercise, this is followed by by a period of increased hunger, ie doing more makes you eat more. Exercise also makes you tired, so you reduce the amount of energy your body uses later on.
• If you eat more calories, this increases the amount of energy your body uses, ie eating more may make you more active.

In other words the body adjusts how much energy you use up depending on how many calories you eat. Buy weight loss tablets online uk.

The important thing seems to be that certain foods can cancel out these natural feedback systems that should keep our weight the same. High-sugar and high-fat foods taste good and can make us feel good too. By triggering the ‘reward’ centre in our brain, they may be especially good at over-riding these controls.

Foods can be divided into three groups (although most foods are a mixture): Buy weight loss tablets online uk.

• Carbohydrates:
  • Found mainly in fruit, vegetables, beans, grains and milk.
  • ‘Refined carbohydrates’ are carbohydrates that have been processed in some way, such as table sugar (sucrose), high-fructose corn syrup (found in many processed foods), white flour, and pasta.
• Fats: found in, for example, animal fat, oily fish, butter, cheese, and vegetable oils.
• Proteins: found in meat, fish, eggs, beans, nuts and meat alternatives.

Refined carbohydrates, fructose and sugar-sweetened drinks have been linked with low levels of feeling full (satiety), difficulty controlling our appetite and a lack of excess energy to make up for the extra calories consumed. Buy weight loss tablets online uk.

There are lots of different ‘diets’ to help someone lose weight. They often target a reduction in a particular food group:

• Low-fat:
  • The most common form of weight loss diet followed since the 1970s.
  • Diets that involve counting calories are commonly low-fat.
• Low-carbohydrate:high-fat diets (LCHF):
  • No calorie counting required.
  • The Atkins Diet.
  • The Keto Diet.
  • The Banting Diet, as first published in 1864.
  • The Paleo Diet – similar to other LCHF diets but excludes dairy foods.
• Low-carbohydrate:low-fat:high-protein:
  • The Dukan Diet.
• Intermittent fasting (reduced calorie):
  • 5:2 Diet.
  • Daily time-restricted fasting (eg, eating only between 12 pm and 8 pm)
  • The Fast Diet.
• Very low-fat, near vegetarian:
  • The Ornish Diet.

One diet does not suit everyone, probably due to differences in our metabolism. All the diets above have been shown to lead to weight loss, with no one diet being more effective than any other. All effective diets should balance good quality of nutrition with the right balance of energy. In addition, a ‘diet’ should be easy for you to stick to or there will always be the risk that once you stop being on such a diet, you will go back to your old habits and put back on any weight you have lost. Buy weight loss tablets online uk.

Tips for losing weight

It is best not to lose weight too fast. You should aim to lose weight gradually. If you lose more than a kilogram per week, you may lose muscle tissue rather than fat. This isn’t sustainable weight loss. So, it is recommended that you lose an average of 0.5 to 1 kg per week (about 1-2 lb per week). Buy weight loss tablets online uk.

Medicines to help with weight loss

Medication to help with weight loss may be an option for some people who want to lose weight. However, there are no wonder medicines available and lifestyle changes to improve your diet and increase your physical activity levels are still important. Buy weight loss tablets online uk.

In the UK there are two medicines licensed to help with weight loss: orlistat and liraglutide (Saxenda®). Semaglutide (Ozempic®) is also sometimes used. You can read more about them in the separate leaflets called Obesity (Overweight) and Orlistat (Weight Loss Medicine). It’s generally accepted that these medicines only work effectively if used alongside diet and exercise changes. Buy weight loss tablets online uk.

Note: two other medicines, sibutramine and rimonabant, previously used to help with weight loss, are no longer available in the UK because of concerns over their safety.