Is Pippa Middleton Using the 'Supermodel's Secret Weapon?'

Is Pippa Middleton Using the 'Supermodel's Secret Weapon?'
Pippa Middleton
Max Mumby/Indigo/Getty

02/17/2016 AT 11:55 AM EST

It's no secret that Pippa Middleton leads a seriously active lifestyle. From running marathons in Kenya to 54-mile bike races and death-defying downhill ski competitions, the adrenaline junkie is always on the move.

But is there a secret weapon behind Pippa's fit physique – aside from her insatiable appetite for extreme sports?

The royal sibling, 32, was recently photographed meeting with fitness guru James Duigan – who has trained elite models Elle Macpherson and Rosie Huntington-Whiteley. Deep in conversation at Duigan's health-conscious Clean and Lean Café in Notting Hill, Pippa was seen looking at a selection of Duigan's food supplements – including his Body Brilliance powder, which the company calls the "supermodel's secret weapon."

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The vegan supplement claims its mix of ingredients, including green tea and guarana, helps boost metabolism and encourage the body to burn fat quicker. Having recently opened a state-of-the-art members club in London (where the air is oxygenated and the light expels Vitamin D), Duigan is known for his holistic approach to fitness.

Is Pippa Middleton Using the 'Supermodel's Secret Weapon?'| The British Royals, The Royals, Pippa Middleton

Pippa Middleton at the Inferno race in Mürren, Switzerland.

Greg Sirc / Splash News Online

Of course, Princess Kate's younger sister hardly needs the added help. Not only does she regularly hit the gym near her Chelsea home, but she has competed in at least eight endurance events in recent years – her most recent one being the grueling Inferno downhill ski race in Switzerland, in which "she did really good", a source told PEOPLE.

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