AceShowbiz - Elle MacPherson is under scrutiny for suggesting people replace dinners with meal replacement shakes in a bid to lose weight.

The Australian is one of the most famous supermodels in the world and is renowned for her lithe figure, which even earned her the nickname 'The Body' in the late 1980s.

As a result, British daytime television show "This Morning" recently recruited Elle to bestow advice for healthy living as the weather hots up, but viewers were shocked to learn that the fashion icon skips meals and relies on liquid dinners in order to stay in shape.

"Sometimes I'll use it (a shake) as a meal replacement in the evenings," the 54-year-old shared. "If I've had a really strong breakfast or a strong lunch I can get away with having a protein shake for dinner."

The mother-of-two insisted that this method is intended for targeted weight loss as opposed to a long-term diet plan but claimed meal replacement shakes provide a "really helpful" way to get bikini body ready.

However, viewers of the programme were stunned by the idea that women had to slim down in order to go to the beach.

"Why are @thismorning promoting 'beach body ready' with @ellemacpherson talking about how she sometimes replaces dinner with a protein shake? NO," one Twitter user exclaimed. "The only way to be beach body ready is by putting on suncream and a swimsuit."

Why are @thismorning having #Ellemacpherson do a section on beach bodies? Her body & lifestyle are not relatable to any of their viewers?! #baffled

— Tor (@MrsChattyV) 20 Juni 2018

While another described Elle's presentation as a "ridiculous" segment of the programme.

The former "Britain & Ireland's Next Top Model" host also shared details of the food she does consume, explaining that she decided to switch to a plant-based, alkaline diet when she turned 50.

"I realised there's been such a change not only in the silhouette of my body but how I feel and my general wellbeing," she smiled.