What is the Sirtfood Diet? Should I Try It?


The sirtfood diet was developed by two “celebrity” nutritionists in the UK and has recently rocketed to the top of this year’s top diet trends due to claims that Adele has used it to lose 40+ lbs.

Adele has not personally confirmed whether she is on the sirtfood diet OR how much weight she has lost.

The creators of the sirtfood diet, Aidan Goggin and Glen Matten, claim that you can “lose weight and not feel hungry. You can lose 7 lbs and 7 days and not gain any muscle. This quote is taken directly from the sirtfood website.

They claim that sirtuins (SIRTs), a group of seven proteins in the body, have been shown to regulate a variety of functions, including metabolism, inflammation, and lifespan. Of note, this study was conducted on fruit flies and rats, not humans.

What do you eat on the sirtfood diet?

“Sirtfoods” purportedly increase sirtuin in the body.

Here is their “top 20 sirtfood” list:

  • cabbage
  • Red grape
  • strawberry
  • Onion
  • soya bean
  • parsley
  • extra virgin olive oil
  • dark chocolate (85% cocoa)
  • matcha green tea
  • buckwheat
  • Turmeric
  • walnut
  • arugula
  • cayenne pepper (looks like serrano pepper)
  • lovage (herbs)
  • Medjool dates
  • red chicory
  • blueberries
  • capers
  • Coffee

During the first week, you should limit your calories to 1000 per day, drink 3 sirtfood green juices per day, and eat one sirtfood-rich meal.

During the second week, you increase your intake to 1500 calories per day, drink 2 sirtfood green juices per day, and eat 2 sirtfood-rich foods per day.

No long term plans. Once you have completed the 2 weeks you are expected to continue to include sirtfoods and green juices.

So basically, they’re telling you to eat healthy and cut calories.

Will I lose weight?

The scale will probably go down. It WOULD be muscle, water, and some fat (I don’t know how two people with a clinical background can claim that you won’t lose muscle on a calorie-restricted diet).

You will probably put the weight back on as soon as the 2 weeks are over.

Goggin and Matten claimed in their very small “in-house” study that participants lost weight and retained muscle, but they did not follow up with any of the participants after 3 weeks.

I’m also not sure how they can claim that you “won’t go hungry”. Your body isn’t going to turn off hunger cues for some magical food combination when you’re only eating 1000 calories a day. It’s just BS.

While they manage to copy and paste people’s wildest dreams into their tagline, this diet is nothing special. It’s just a repeat of every other diet we’ve ever seen: eat this, not that, starve yourself, lose the weight, gain it back, then come back for the next new “celebrity” diet.

Remember the Dukan diet, the 5:2 diet, and the cabbage soup diet? All of these diets were endorsed by celebrities at one time, but you don’t hear about them that often today. The sirtfood diet will take center stage then it will fade away when people get bored and the media will cover the next fad.

What can I do instead?

Do you find yourself constantly trying to follow the rules of various diets for years? There are no peas or peanut butter in paleo. There are no grains or dairy on Whole 30. There is no bread or fruit on keto. The list goes on and on and it’s no wonder why everyone is confused about how to eat

My best advice? Stop following all these arbitrary rules not made for you but to be sold to the masses

Discard the notion that the next diet (AKA arbitrary rule) will be the ONLY one. It’s not. The only thing that works in the long term is developing a specific plan of action that energizes YOUR body as best it can and makes you feel happy and fulfilled. ⁣⁣

If you’re not sure how to do it, it’s time to seek help and hire a registered dietitian.

Megan (Ware) Poczekaj is a registered dietitian nutritionist in Orlando, FL. He has a private practice, Nutrition Awareness, where he teaches other entrepreneurs how to maximize their productivity and performance with nutrition. He is the author of The Optimized Life: A Nutrition Guide for Entrepreneurs.