The so-called Sirtfood diet guarantees a weekly weight loss of seven pounds claiming it will help fight weight gain and aging effects
Nutritionists Glenn Matten and Aidan Goggins are the founders of Sirtfood diet, claiming their diet plan will activate proteins related to the gene SIRT1, or “skinny gene”.
The diet’s main principle is founded on the concept that specific foods cause sirtuin, a protein found inside the body which allegedly assists metabolism regulation and protects cells to combat the process of aging.
Those advocating the diet and its benefits claim that consuming foods like kale, salmon, citrus fruits, blueberries, and green tea - all sirtuin-rich - boost the body’s metabolism and kick-start a fast weight loss process.
The diet is divided into two distinct phases. Firstly, dieters must restrict their daily intake of calories to 1,000 daily, consuming a single sirtfood-rich dish every day and drinking three juices that are derived from green fruits or vegetables for a period of three days.
The diet’s second phase continues for 14 days, requiring dieters to consume three dishes rich in sirtuin per day alongside a glass of green juice.
Sirtfood diet - and sirtuin - not definitively linked to weight loss
The diet has been criticized for lacking key nutrients such as iron and calcium, and for being extremely restrictive: it requires quite a lot of calorie counting.
There have also been no studies linking foods rich in sirtuin to weight loss. Experts claim that the diet is guaranteed to encourage short-term weight loss through calorie restriction and hydration (consuming primarily juice for the diet’s first phase).
Experts and critics of the diet claim that regardless of whether green juices are rich in sirtuin or healthy, any individual would lose weight on a diet of only 1,000 calories daily.
Although the diet may not be sustainable long-term, incorporating healthy foods rich in sirtuin into a balanced diet can definitely be beneficial.