Advocated not only by it's creator, Dr D'Adamo, the 'Eat Right For Your Blood Type' diet is also promoted by some of Hollywoods elite such as Demi Moore.
With findings suggesting that 6,500 participants of the study reported health benefits as well as weight loss, it's easy to see why many people jumped on the band wagon.
So what is the Blood Type Diet?
In a nut shell the theory behind the diet is that blood groups developed over thousands of years. And depending on which type you are, your diet should consist of different things to other blood groups.
Blood Type O
The first blood type. From way back when we were all hunter gatherers and all we ate was meat. It is suggested that people with blood type O should eat a mainly high protein diet cutting out carbs, dairy and wheat. Sound familiar - it's simply a variation of the Atkins Diet.
Blood Type A
Dr D'Adamo claims that this blood group developed when our ancestors were settling down and farming the land. So he suggests that following a mainly vegetarian diet but still avoid dairy products and little meat.
Blood Type B
Only 1 in 10 people have this blood type, and yet it is the one with the least dietary restrictions. The book claims that this blood type evolved when our ancestors were travelling and therefore type B's can eat the whole spectrum of foods, although processed foods are not recommended and only small amounts of carbohydrates.
Blood Type AB
Dr D'Adamo suggests that type AB should stick to a mainly vegetarian diet (like type A) and eat meat and fish and dairy (like type B) but sparingly.
Medical experts agree that the Blood Group Diet theory is nonsense. There is NO LINK between your blood type and the diet we should be eating. Not only that but following such a restricted diet could have dire consequences later in life due to deficiencies; cutting out calcium for instance puts you at risk of developing Osteoporosis, avoiding meat can cause an iron deficiency.
I'm not a fan of this diet. It's full of pseudo science and although it gives the impression of a firm grounding in science fact - this is just not the case.
I recommend a varied diet of healthy and nutritious foods and cardio exercise. If you need a helping hand to kick start your diet, try one of the many proven herbal diet pills that are available. In combination with diet and exercise they can be a highly effective dietary aid. Also be realistic about your weight loss goals, decide how much weight loss is achievable in a set period of time and set that as your goal - don't set a goal of 2 stones in 2 months as when you don't achieve this, you will lose motivation and fall into the yo yo dieting cycle that can cause more weight gain than weight loss.
The idea of different dietary requirements based on blood type is an interesting concept. It is a good example of the individual differences between each person and there is some scientific evidence that certain blood types produce antibodies to substances (eg soy, peanuts) at different rates.
However, Dr D'Adamo's interpretation of human evolution is selective to say the least. There is very little science behind this eating plan (almost none) and it just does not bear out in practise. Although 42% of the public are Type O - and surprise surprise, often these Type Os will cut out the refined carbs and sugars and suddenly feel better. But this is nothing to do with the Blood Hype diet. (sorry, Blood Type).