Common Sirtfoods include, apples, soybean, kale, blueberries, strawberries, dark chocolate (85 percent cocoa), red wine, matcha green tea, onions and olive oil. The Sirtfood diet gets some of its fame because red wine and chocolate are on the list.
The diet involves two phases over three weeks. During the first three days, total energy intake is restricted to 4,200 kilojoules per day (or 1,000 Calories).
To achieve this, you drink three sirtfood green juice drinks that include kale, celery, rocket, parsley, matcha green tea and lemon juice. You also eat one “Sirtfood” meal, such as a chicken and kale curry.
On days four to seven, you have 2-3 green juices and one or two meals up to a total energy intake of 6,300 kJ/day (1,500kcal).
During the next two weeks — phase two — total energy intake should be in the range of 6,300-7,500 kJ/day (1,500-1,800 kcal) with three meals, one green juice, and one or two Sirtfood snacks.
There’s a diet book available for purchase which gives you the recipes.
After three weeks, the recommendation is to eat a “balanced diet” rich in Sirtfoods, along with regular green juices.
The idea of losing a lot of weight in just three weeks will appeal to many people.
The eating plan encourages a range of polyphenol-rich foods that are also good sources of vitamins, minerals and dietary fibre, and would be recommended in a range of diets designed to assist with weight management, or as part of a healthy, balanced eating plan.
A weight loss diet will be effective if it achieves sustained total daily energy restriction. So the biggest benefit of the Sirtfood diet is the daily energy restriction — you are likely to lose weight if you stick to it.
The food list includes specific products that may be hard to locate in Australia, such as lovage, a European leafy green plant whose leaves can used used as a herb, roots as a vegetable and seeds as a spice. Some other items on the list can be expensive.
Most research has looked at the sirtuin-mediated effects of energy restriction in worms, mice or specific body tissues. No studies have tested the effect of diets that vary polyphenol content on the action of sirtuins in mediating weight loss.