She's spent eight years navigating the tricky waters of the White House and supporting arguably the most powerful man in the world, yet Michelle Obama doesn't look to have aged a day.

Now the secret behind the 52-year-old's youthful look has been revealed, and her fresh face is apparently thanks to a tip from the Duchess of Cambridge.

The First Lady's make-up artist Carl Ray says that Kate recommended £43 ($54) Biotulin Supreme Skin Gel to Michelle - a non-injectable 'organic Botox'.

Kate shows off her youthful glow at the premiere of a Streetcat Named Bob in London. The Duchess has reportedly been sharing her skincare secrets with Michelle Obama

After eight years as First Lady Michelle Obama has hardly aged a day and apparently it's all down to 'organic Botox' recommended to her by the Duchess of Cambridge

Biotulin gel, £43, contains plant extracts that plum the skin and relax the muscles to smooth out wrinkles

'Michelle Obama has been using this organic Botox gel regularly on the recommendation of Kate Middleton,' Carl told Celebrities Style, adding that it is 'unbelievable' for erasing wrinkles.

The gel contains a natural local anesthetic extracted from the plant Acmella oleracea, which promises to reduce muscle contractions and relax the facial features around the eyes and between the eyebrows.

This promises to reduce fine lines and make the skin noticeably smoother.

It also contains extracts of Imperata cylindrica, a hardy grass that grows in South America’s desert regions, which gives an intense moisturising effect.

The third key element is skin-plumping Hyaluronic acid to restore fullness to the face.

Biotulin claims to provide visible results in 60 minutes that last up to 24 hours.

Carl has previously revealed that Michelle likes to keep her skincare regime simple and natural, relying on exercise, plenty of water, a good diet and sleep to keep her glowing.

Kate and Michelle first met at a reception at Buckingham Palace in May 2011

The pair had the chance to catch up again when the Cambridges hosted the Obamas for dinner at Kensington Palace in April this year

Michelle Obama at a victory rally in 2008, following her husband's election win. The First Lady has barely aged a day since she first took up residence in the White House

And the First Lady herself confirmed in an interview that she doesn't go in for a complicated regime.

'It's really pretty basic. I wash my face with a good cleanser, and I use a moisturizer with an SPF,' she told Prevention.

'Every now and then I'll go to a dermatologist for microderm or a facial, but I don't have time to do that all the time.'

THE OTHER SKINCARE PRODUCTS THAT KEEP KATE GLOWING Lancome Hydra Zen face cream: £39.50 This face cream claims to moisturise and soothe skin for long-lasting hydration. Enriched with naturally-derived plant extracts, it promises to relieve skin from environmental skin aggravation and, if used every morning, it will apparently help create a radiant, glowing complexion. Lancome Advanced Genifique serum: £59 Kate's favoured serum is said to help restore youthfulness, with supposed benefits including smoothing fine lines and deep wrinkles, boosting radiance and increasing elasticity. Trilogy Rosehip Oil: £19.50 Kate apparently slathered her skin in rosehip oil while pregnant with Princess Charlotte as it's excellent for guarding against stretch marks. Rosehip oil's potent natural actives make it highly effective for a variety of skin concerns including dehydrated and ageing skin. Trilogy’s rosehip oil contains essential fatty acids (omega 3 and 6) and fatty acid (omega 9) content and promises to help improve the appearance of scars, fine lines and wrinkles. Karin Herzog Vita-A-Kombi 3 Spotzapper: £28 The Duchess keeps her complexion clear with this hero product from Swiss skincare brand Karin Herzog. As well as treating acne and blemishes, it tackles hyper pigmentation and reduces scars, while deeply hydrating the skin and accelerating the natural recovery process. Advertisement

The Duchess is also a fan of natural skincare and is reportedly a convert to Beuti Skincare's Beauty Sleep Elixir, which contains 14 plant-based oils that neutralise the enzymes that inflame and damage the skin.

It's not known for certain when Kate passed on her skincare secret to Michelle, but the pair were first introduced at a reception at Buckingham Palace in 2011, shortly after the royal wedding.