Type of Diet: This diet has been developed by the CSIRO, Australia's largest research and development organisation. It is relatively high in protein and low in fat but also encourages a moderate consumption of carbohydrate foods, particularly wholegrains and those with a low glycaemic index (GI).

How the Diet Works: Protein and low GI foods are considered more satisfying, and thus can reduce appetite. The aim of the diet is to increase the protein intake a little above the recommended level to increase satiety but still maintain sound nutrition that can be followed for life.

Results: The CSIRO conducted some short-term studies of this diet comparing it to the more orthodox high-carbohydrate, low-fat diet for losing body fat. They found the CSIRO diet was for some people just as effective as the more orthodox diet but they also found better adherence with less people dropping out of the study.

Nutritionist's Comments: Although the CSIRO diet is relatively new and hasn't any long-term evidence supporting it, it does appear to be a promising healthy alternative to higher protein diets like the Atkins. It promotes the intake of nutritious carbohydrate foods and is low in fat. The only drawbacks are that it does not really cater for vegetarians and it doesn't address all aspects of the dietary guidelines.


Type of Diet: This diet is based on your blood type. Depending on your blood type, a range of foods are allowed.

How the Diet Works: The belief is that if you eat right for your blood type, your digestion will improve and you will lose weight. Your general health will also improve and you will get fewer infections such as viruses.

Results: This is not really a weight loss diet, thus there is not a lot of evidence supporting it. Scientifically there is no merit in its claims about preventing ill-health.

Nutritionist's Comments: Weight loss will probably result by undertaking this diet, but only from the restriction of food intake. Unfortunately, many healthy foods are eliminated, depending upon the different blood types. This, inevitably makes it very difficult for some to follow a nutritionally balanced diet. It's all too hard and not necessary.