The grapefruit diet involves consuming grapefruit with every meal of the day for 12 days, supposedly resulting in great weight loss. Generally speaking, the grapefruit diet is principally based on protein; it is a very low-calorie diet, and cuts out most carbohydrates. An example diet plan provided on Boots WebMD includes items such as eggs, grapefruit, and bacon for breakfast, salads with unlimited meat and grapefruit for lunch, and red or green vegetables (but not starchy veg such as peas) with unlimited meat and grapefruit for dinner. Healthline highlights some other, slightly unusual rules of the grapefruit diet; these include that you should not consume very hot or very cold foods, nothing should be prepared using aluminium pans, and high-protein meals should be consumed at least four hours apart from high-starch meals.
Most versions of this diet recommend a daily calorie intake of 800-1,000 calories; this is likely to be significantly less than you would usually consume, and so the diet could well help you to lose weight with or without the addition of grapefruit. Grapefruit is known as a ‘superfruit’, and is believed by many to hold special weight loss powers. It is extremely difficult however, to find a detailed explanation of how grapefruit supposedly works to burn fat in the body. Whether it has weight loss properties or not, there is little doubt that grapefruit is a healthy addition to the diet for most people. Many proponents of the grapefruit diet claim not only that it works, but that they were able to lose a significant amount of weight within a very short period of time. It is likely that reducing your calorie intake to less than 1,000 calories per day will have an effect on weight, and will help you to shed the pounds – particularly if combined with regular exercise. A literature review reveals no scientific studies that have been specifically formed to test the effects of the grapefruit diet.
Scientific studies usually involve randomised, double blind, placebo controlled trials; this means that the volunteers involved in the trial are divided in to two or more groups, one of which is given a placebo, and the other(s) which is given the substance being tested. Few studies appear to have been performed that consider the impact of grapefruit consumption of weight, and related factors, nevertheless, a few can be described here. Although most of the subjects did lose weight, the differences in weight loss, body composition, and energy balance between the three groups were not statistically significant. A second study on grapefruit consumption was published in the journal ‘Metabolism’ in 2012.
The trial continued for a period of six weeks, and by the end, results indicated that there was no significant difference between the groups in weight, blood pressure, or lipids. Interestingly, a study published in 2006 has suggested that grapefruit and grapefruit products may have a beneficial effect on body weight.
Another study has indicated that grapefruit pectin may have a beneficial impact on plasma cholesterol, and low-density lipoprotein.
Finally, a study performed on mice has been published in October 2014 that suggests that grapefruit juice consumption may aid high-fat diet induced insulin resistance, and weight gain. In conclusion, whilst a small selection of studies has been performed on the impacts of grapefruit and grapefruit juice on weight loss, the results are contradictory and largely inconclusive. Whilst grapefruit is generally beneficial for the health, there are certain individuals that should not consume too much.
It is also important to note that despite one study indicating that the fruit may be beneficial for the treatment of diabetes, this study was performed using small mammal subjects that did not even have diabetes, and so the results are not directly transferable to humans, and the effect certainly has not been definitively proven. Moreover, the diet portion of the weight loss plan is not recommended by health professionals. The grapefruit diet has been around for many, many years, but if you do not feel that it is for you, there are numerous other popular diet plans that may better suit your lifestyle. In order to lose weight, it is integral that your diet is altered, as well as your lifestyle.
The above are general tips for a healthy diet, but there are a number of specific diet plans available to choose from; many people find it easier to follow a select set of rules than to constantly count their calorie intake. Each of these diet plans will suit different people, for example, the paleo diet is based on the idea of eating the same foods as our ancestors, and mostly consists of protein, vegetables, and nuts; this involves considerable changes to your diet.
The Weight Watchers diet is different again; this plan work on a ‘pro points’ system, whereby each food type is allocated a certain number of points, and the amount of points you can consume in a day is restricted.
The grapefruit diet is a very intense weight loss programme that involves a considerable reduction in calorie intake, and as such, would only be suitable for short-term weight loss goals.
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The information provided on this site is of a general nature only and is not meant to replace the advice of your doctor or pharmacist. To use the Grapefruit Diet for weight loss, all that is required is to eat the fruit or its juice throughout the day.
The grapefruit diet can be followed by anyone who wants to lose flabs on their arms, inches on their waistline, and fats on their legs.
Obese individuals were tested under a grapefruit diet plan and the results were conclusive. Individuals who are already at risk of diseases related to blood clotting are advised against this diet.
Although a natural weight loss food item, grapefruit in high doses can change the body’s way of creating cortisone. The Liddle’s Syndrome is an issue with the kidneys wherein they tend to work over efficiently. Those who opted to follow the intensive 3-day grapefruit diet for an extended period of time are at a higher risk of being undernourished. The material on this website is intended for information only, this site does not offer medical advice, diagnosis and treatment. The grapefruit diet started as a very low-calorie, low-nutrition fad diet in the 1970’s and it has come in and out of popularity during every decade since then. A 2004 study funded by The Florida Citrus Department found that participants lost an average of 3–4 pounds over 12 weeks by eating half a grapefruit or drinking grapefruit juice with each meal and exercising regularly; many participants lost more than 10 pounds.
Eat two eggs and two slices of bacon for breakfast with half a grapefruit or eight ounces of unsweetened grapefruit juice. Eat a lunch of as much meat and salad (non-starchy vegetables) as you want with half a grapefruit or eight ounces of unsweetened grapefruit juice.
Eat a dinner that includes as much meat or fish as you want, salad or vegetables that are not starchy, and half a grapefruit or eight ounces of unsweetened grapefruit juice. 10 Best Everyday Foods to Eat for Weight LossBoost your weight loss by adding metabolism-boosting, filling foods into your diet. The Juice Cleanse Diet: 5 Fast Facts You Need to KnowInterested in doing a juice cleanse or a juice detox? You are only allowed to have certain foods during the diet, mainly non-starchy and leafy vegetables, cheeses, hot dogs, salad, etc.

The overall diet is based on the idea that grapefruit helps to burn fat when consumed alongside protein. In all cases, ‘grapefruit’ indicates either half a grapefruit, or a glass of grapefruit juice.
Depending on the version of the diet that you choose to follow, a loss of 10 pounds can be promised at the end of the 12-day diet period. It is thought to burn fat using a special enzyme, and also claimed by some to suppress the appetite and boost the metabolism. Usually, fat burning ingredients purport to work through the process of thermogenesis; this action increases the internal body temperature, and in turn, supposedly boosts the activity of the enzymes that are involved in lipolysis (the breakdown of fat molecules).
As with the majority of fruits, grapefruit contains lots of vitamin C – a vitamin that has numerous benefits for an individual’s overall health, and particularly for the immune system. It should be mentioned that the claims made by variations of the grapefruit diet are often strong, and the weight loss targets are not recommended by health professionals who often state that it is unhealthy to lose that much weight in such a short period of time. The second part of the diet is less well evidenced; it is thought that grapefruit helps people to lose weight, but there is no strong evidence that the consumption of large portions of grapefruit benefit weight loss by burning fat, boosting metabolism, or suppressing the appetite. A scientific study, or clinical trial, is a method used by scientists to determine whether or not something is effective, or safe. The subjects do not know whether they are receiving the product or the placebo, to minimise psychological effects. The only difference noted was that the subjects consuming grapefruit and grapefruit juice appeared to have better lipid profile benefits.
This study attempted to determine whether or not the folklore that consuming grapefruit could aid weight control holds any truth. The group consuming grapefruit did however have a significant reduction in waist circumference by the end of the trial.
This study involved 91 obese patients who were randomly allocated to receive a placebo and 207ml apple juice, grapefruit capsules and 207ml apple juice, 237ml grapefruit juice and a placebo, or half a fresh grapefruit and a placebo capsule.
The conclusions drawn from the study were that grapefruit juice may be able to benefit individuals with obesity associated with the western diet. It seems possible that the substance may have a beneficial impact on cholesterol levels; however there is no direct evidence that it will aid weight loss.
Grapefruit juice can interact with certain medications, and boost the levels of the substances in the blood. If you do suffer from diabetes, do not replace your medication with grapefruit; this could be dangerous. Although the precise amount varies between different versions of the plan, it is often stated that you can lose 10 pounds by the end of the 12 day plan. It may be best to consider another diet plan if, for example, you are looking for a more long-term solution to weight loss, if you don’t wish to reduce your calorie intake by such a considerable amount, or if you simply don’t like the taste of grapefruit! The key is to keep your energy expenditure higher than your energy intake, and this is achieved by undertaking a diet alongside regular exercise. In order to succeed on the 5:2 diet on the other hand, you must have the will power to restrict your calorie intake substantially for two days of the week. As with the 5:2 diet, no food groups are banned, and you can eat what you like, as long as you stick to the simple rules. Whilst the diet is likely to help you to lose weight, the precise effects of the grapefruit are not well understood. How this site worksWe think it's important you understand the strengths and limitations of the site.
The information on this site is not reviewed by a medical professional, and is only to be used at your own risk.
We do our best to maintain accurate and complete information that is kept up to date, but we cannot (and do not) provide any warranty of the accuracy of any information provided on this website. And there’s only one reason for that – it is the diet plan that can get all those unwanted pounds off in a very short period of time. On top of that, it has all the fat-burning abilities that would speed up one’s metabolism and initiate weight loss. But like most diets are, this one is recommended only to people who have a clean bill of health. This diet plan is considered as a crash diet and so it comes with absolutely no guarantees. Fatigue and feeling unwell are experienced by people who are not so used to dieting at all.
This diet calls for only 800 calories consumed daily, and that may not be enough for people who have higher daily requirements. It also used to be called the Hollywood diet or the Mayo Clinic Diet (even though it has no connection to the actual clinic). The diet is based on the belief that enzymes in grapefruit and other citrus fruits have powerful fat-burning capabilities. 5 Superfoods to Add to Your Diet TodayThese foods help you lose weight and still taste good. Grapefruit Diet is a fad diet that tells you to consume as much as grapefruits in breakfast, dinner and lunch. This diet claims that you will be able to lose 10 lbs within this 12-day period without suffering from hunger. There are also foods that you are prohibited to eat, among these are starchy vegetables, peas, corn, pasta, jam, fruits, pretzels, etc. You also need to drink plenty of water, at least 8 glasses, so as to help cleaning your body system. There are several versions of the diet, but generally speaking it involves the consumption of foods from a select menu, amounting to no more than 800 calories a day.
Aiming at quick weight loss, the diet is only really a short-term solution, and involves mostly fluid rather than fat loss. If the diet is to be extended beyond 12 days, then the same plan should be followed two days after the first 12 days are over. For these reasons, extract from grapefruits has even been added to a number of weight loss supplements available to buy on the market; examples include Super Ketone Plus, and Activ8 X. The diet supposedly works via two mechanisms – the first being the overall reduction in calorie intake and consumption of lots of protein but little carbohydrates, and the second being the consumption of considerable amounts of grapefruit.
The evidence for the diet, and for the potential weight loss properties of grapefruit, will be discussed in more detail in the section below. In this case, studies would be performed on either the grapefruit diet as a whole, or grapefruit consumption alone, to test whether or not they have any beneficial effects for the human body in general, and for weight loss in particular.
If they are reliable, these trials will be published in a well-known scientific journal; in order to be accepted by one of these journals, the paper will have undergone a process of examination, and the methods will have been critically analysed by experts. This study attempted to determine the effects of grapefruit and grapefruit juice on weight loss and several associated variables.

Overall, the results of this trial indicate that grapefruit and grapefruit juice consumption are not likely to have a significant impact on weight loss in humans. In order to do this, 74 overweight adults were involved in a randomised, placebo controlled trial. Total cholesterol and low-density lipoprotein was also significantly reduced in the grapefruit group.
The methods used were double blind and placebo controlled, and volunteers were at medium to high risk of coronary heart disease due to hypercholesterolemia. It has been suggested that this study is proof that grapefruit juice can help to treat diabetes however this is not the case. More studies need to be performed using reliable methods and large human sample sizes in order to confirm the results. Examples of medications that should not be taken alongside considerable portions of grapefruit include: statins, diazepam, calcium channel blockers, sertraline, amiodarone – a medication for irregular heartbeat, and Viagra. It is usually recommended that when dieting, people aim for around one to two pounds weight loss per week; considerably less than is advertised for the grapefruit diet.
The National Heart, Lung, and Blood Institution have suggested that in order to lose weight, a healthy diet should emphasise fruits, vegetables, whole grains, and low fat diary products, as well as consuming lots of protein such as lean meat and beans. This diet does however give you the freedom to eat what you like five days a week, and so does not involve re-stocking your cupboards like the paleo diet. For more information on different diet plans, and which will work best for you, see our Best Diet Plans article. There is little doubt that the consumption of grapefruit is generally good for the health, but the scientific evidence that the substance can help to burn fat and ultimately boost weight loss is lacking. We're a journalistic website and aim to provide the best health supplement reviews, guides and tips, but can't guarantee to be perfect, so do note you use the information at your own risk and we can't accept liability if things go wrong.
Always consult your doctor before using any supplements, especially if you have a prior medical condition. To understand and evaluate this no-so new diet plan, it is important to know everything about it first. It is not for someone who is suffering from any kind of diseases, as this diet could either interfere with one’s medication or render it ineffective.
All that a person needs is a daily supply of grapefruit and grapefruit juice in order to sustain their 3-day or 10-day diet plan, depending on how fast they wanted it to work for them. Because of this side effect, those who suffer from heart diseases and blood pressure problems cannot follow this diet. It all sounds kooky, but there has been research that has shown some connection between grapefruit and weight loss. Grapefruit Diet is not a long-term program and lasts for a period of two and a half months.  This diet came into being because the inventor believed that grapefruit is effective when mixed with all kind of foods.
Grapefruit is of course a main component of the diet; the fruit is purported to hold fat burning properties. The diet does not restrict things like salad dressings and butter, and you are not restricted on how to cook and prepare the food.
A total of 85 obese human subjects were used in the trial, and were randomly divided in to three groups. Whilst the study did not provide any strong evidence for grapefruit aiding weight loss, the differences that were found could warrant further study. The results showed that those in the fresh grapefruit group lost significantly more weight than those in the placebo groups. The study was performed without dietary intervention, and the results indicated that grapefruit pectin supplementation may be able to reduce the risk of coronary heart disease by altering cholesterol levels.
Although it may provide an indication, this study was performed on mice subjects and so the results are not directly transferable to humans; moreover, none of the mice involved had diabetes. It is also noted that controlling portion sizes is very important, and this is something that does not always come with diet plans, making it easy to slip back to old habits when you come off a diet. There are some people who should not consume such large quantities of grapefruit, and it should be remembered that there are many more diet plans available to choose from.
In this diet style, it is strongly advised that you try to reduce the amount of food that you normally take for each meal for much faster results. Losing 10 pounds after 10 days of the more conservative grapefruit diet plan is the ideal result.
However, many doctors advise against crash diets, as it can be potentially hazardous to one’s health. You can eat: chicken veggies spinach  and all other type of foods in combination with grapefruit Grapefruits are a negative calorie food and are free from fats. Beverages are however restricted; black coffee is recommended, as well as water and of course, unsweetened grapefruit juice.
The first group consumed 127g of grapefruit, the second group consumed grapefruit juice, and the third consumed water for 12 weeks following the completion of a two-week calorie restricted diet.
The subjects were then randomly allocated to either a control diet, or a diet in which participants consumed half a fresh Rio-Red grapefruit with each of the three daily meals. Please also note that the editorial line (the things we write) is NEVER impacted by these links. Higher figures can be expected once the subjects were told to lessen food intake and do a few rounds of exercise to go with the grapefruit. Evidence that consuming grapefruit aids weight loss is inconclusive, and will be discussed in more detail below. We list our independent criteria for both reviewing products and also the criteria by which products are listed as Approved. Grapefruit is rich is vitamin C and is famous for its ability to secrete an enzyme that is capable to burn body fat. This diet plan suggests having grapefruit juice or grapefruit pills or eat the actual fruit during every meal and also says you should eat grapefruit at least three times a day along with a small volume of meats and vegetables. The latest version of this diet suggests combining the grapefruit formula with weight loss programs such as Atkins and South Beach. You can repeat the dieting cycle after the brake for two and a half months, which come around 75 days. MyFit Conclusion Grapefruit is considered as a healthy fruit with no fat and fat is critical for our skin, brain and organs. While grapefruit is rich in vitamin C and contains beta-carotene that can act as antioxidant, a small volume of sodium and some fiber content, no diet should be based off of one food.
This diet is a calorie restrictive diet and should not be followed as there is no lifestyle recommendations to maintain this weight loss such as an increase in strength training or building muscle with protein foods.

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