Dieting is hard, from both a psychological and a physical point of view. And, as if this wasn’t enough, dieting can be twice as trying when the person in question is having problems shaking off the extra pounds, despite obeying to the letter all those strict rules. As it turns out, diet guru Peter D’Adamo knows how this comes to happen and, after having already imparted his knowledge to the likes of TV star Oprah Winfrey, he says gaining and, consequently, losing weight is in our genes.

“The GenoType Diet,” D’Adamo’s latest book, scheduled for release in January, is said to hold the key to all our diet-related questions so far, and to additionally bring concrete cases to light, that is, cases of women who have taken up the dietary regime, with the most amazing results. Oprah, whose weight we’ve seen fluctuate in the past, is said to be one of those women who fight the extra pounds by paying close attention to what their genes “tell” them.

“We all fall into six basic gene types, but you don't need a blood test to determine which one you are. Physical characteristics, such as body shape and health problems are more telling,” D’Adamo tells the British newspaper “Daily Mail.” From this, he identifies the types as The Hunter, The Teacher, The Explorer, The Gatherer, The Warrior and The Nomad, each coming with a specific set of traits, which, in turn, determine the types of food that should be consumed or altogether avoided. “Each GenoType has its own problems regarding weight and metabolism, which is why they need their own diet.” D’Adamo further explains, adding that Oprah is also amongst the stars who have followed his dieting advice to the most incredible results.

The GenoType Diet is loosely based on the once-popular Blood Type Diet that used to cause quite a frenzy in Tinseltown a couple of years back. However, what it brings new to the table is that it also takes into account the body shape and certain physical traits of the struggling dieter, when making recommendations as to what should be eaten and what should not. More information on that is yet to be disclosed in January, when the book is out. Nevertheless, if Oprah trusts this diet to get back in shape, then we can only guess it must be for a pretty good reason.