But it wasn’t long before Nelson was left “starving and lightheaded” and suffering from headaches after only drinking kale and apple juices, and restricting her calorie intake so drastically.
At one point during the video, Nelson suffers an intense migrane because she’s “undernourished”. When attempting Adele’s reported pilates regime, Nelson said she had to “slow down and take a couple of breaks”.
“At times I was getting a little bit lightheaded because, you know, I only had three juices today, so that was tough.”
At the end of the gruelling week Nelson had lost 3kg, which she completely credits to “water weight”.
“Not to be TMI, but the green juice and drinking all the water keeps you very regular,” she said.
“It’s really easy to lose weight that way when you’re drinking lots of juice and it just goes right through you.”
US dietician Sophie Medlin told Get the Gloss she wouldn’t recommend the Sirtfood diet, as “keeping this up long term can prove very difficult and often requires big shifts.”
“While we may encourage some of the healthy foods, strict regimes and replacing meals with juices often lead to difficulties with people’s relationship with food and can lead us to lose sight of how much weight loss is too much.”