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The Truth Behind Those Crash Diets

Most traditional diets are unsustainable, and based on unrealistic expectations of ourselves, and as a result, are destined to fail - leading to that inevitable rollercoaster of weight-loss and weight-gain that we hear so much about.

Let's face it, that diet you started as part of a 'New Year's Resolution' has probably been and gone by now. In fact, any diet started as part of a 'New Year, New me' ethos, isn't likely to stick for very long - not because you don't want it enough, but just because crash diets DON'T work. Why? Most traditional diets are unsustainable, and based on unrealistic expectations of ourselves, and as a result, are destined to fail - leading to that inevitable rollercoaster of weight-loss and weight-gain that we hear so much about.

With this in mind, I thought I would talk you through some of the most popular diet plans available, giving you the low-down, from a scientific point of view, of the pros and cons of each.


The Mediterranean diet is one of the best ways of eating out there, as proven by many scientific studies of the health benefits it provides. The principles of the Mediterranean Diet include eating lots of fruits, vegetables, cutting out processed foods and salt and limiting red meat intake. In essence, eating REAL food in sensible portions. However, don't think that you can eat pizza and pasta to your heart's content - we aren't talking about that sort of Mediterranean diet!

It contains a good balance of carbs, whilst being low in processed foods and high in healthy fats like olive oil, as well as nuts and fish (which means great things for our omega 3 levels), and can be cheap and easy to keep up as it is full of basic, 'real food' ingredients. The only minor downside to the Mediterranean Diet is that it generally means you need to cook meals yourself - eating out, or buying ready meals can be trickier as they will generally include high salt, fats and processed food. However, cooking for the Mediterranean Diet is quite straightforward, and most restaurants should provide some healthier options that adhere to the principles of the Mediterranean Diet.


Traditionally one of the most common diets in the industry - most of us will have tried a low fat diet at some point. The low fat diet is pretty much what it says on the tin - removing most or all fats from your diet. While there are masses of low-fat food choices available in most supermarkets making it an easy option for many, these tend to be highly processed, and are often high in sugar and additives.

The low-fat diet has been recommended to us for years, but it is actually based on flawed science as fat is essential for healthy brain and body development. In fact, it may have done us more harm than good as it has pushed us into eating more carbs and sugar to replace the fats we aren't consuming. Has this medical advice actually made things worse?


Low carb diets include the Atkins diet, Dukan diet and Banting diet. These diets have become very popular in recent years as a backlash to the low-fat diet. Whilst this diet is okay in principle - cutting out certain carbs can mean cutting out the sugars and processed grains that many carb-rich foods are comprised of - carbs are also one of our major sources of energy. In fact, it is recommended that 50% of our energy comes from carbs. The problem is that most people just think of white bread, pasta, biscuits and cakes instead of good carbs such as vegetables and whole-grains, which are much healthier for us, and help provide us with our recommended daily allowance of fibre - so cutting out carbs means you're probably not getting enough.


Originally designed for people with diabetes, Low GI diets aim to encourage low glycaemic index foods. Low GI foods break down more slowly in the body, which means we don't get the peaks in blood sugar that lead to high levels of insulin, and a rapid drop in blood sugar - which leads us to reaching for more sugar as a result. Many of the Low GI foods have better health benefits, and have also been found to help you metabolise fat more efficiently. The problem is that it may cause you to make unhealthy food choices as, for example, fat lowers the GI of food so crisps have lower GI than normal potatoes. You are far better just sticking to an eating plan that reduces processed food as much as possible - which generally leaves you with mainly low GI foods anyway.

So, what's the conclusion?

Scientific studies show that no specific diet works any better than another in the long-term. No diet works if we look at it as a quick fix solution to our weight problem. No diet will work if we struggle to make it fit in with our family, work or other commitments. No diet will work if it means denying ourselves food that we love - because when our willpower fails, as it inevitably will, we will just give up the diet until next January! Finally, no diet will work if it demonises a particular food group and expects you to exclude it. What should you do instead? Simple. All diets have some element of sense hidden amongst the nonsense - you just have to find it.

So, throw out the 'fat-free' diet food and eat healthy fats in moderation, lower your intake of carbs and ensure you eat the wholegrain, non-processed variety, and try to eat fresh, real food like they do in the sunny Mediterranean. Try to keep to it most of the time allowing yourself a few indulgences when you need them without beating yourself up about them. Now call it a healthy eating plan for life rather than a diet, and maybe, this year, you will keep it up long-term!

For more information about how you can live a healthier life, take a look at the Vavista Programme.