Elle Macpherson, 50, Shows Of Her Hot Bikini Body To Promote New Wellness Drink (PHOTO, VIDEO)

How does Elle Macpherson do it? The 50-year-old has posted a stunning bikini photo to her Twitter account to promote her latest venture, a wellness drink known as "Super Elixir."

In the photo Elle is seen holding a green drink while showing off her toned legs and abs in a tiny gray bikini. The caption reads, "Super greens... After super swim."

The green drink in question was developed for Elle by nutritional doctor Dr. Simone Laubscher and is sold thru her Welleco company. Elle is a firm believer in what she's selling - she swears the potent blend of 4 essential super greens (plus 41 other super food ingredients) is her secret to looking fabulous.

The Elixir, which comes in powdered form (for popping in smoothies or juices), is described as being designed to "support your healthy nutrition at a cellular level" and claims to help all systems of the body work at their highest function.

It is also a hot selling item as well. It already sold out twice at high end retailer, Selfridges. Co-founder Andrea Bux revealed: "Selfridges ended up taking twice their opening order and still sold out. Modern customers want a total approach to beauty and health and are searching for a premium solution such as SUPER ELIXIR. Really for less than a coffee a day, it's obviously not that big of a leap for people."

Elle discussed turning 50 in a recent issue of New York Magazine. She said, "I have become more at ease with who I am. The great thing about turning 50: I really value grace and wisdom today. The emphasis is on how I feel, not necessarily how I look..."

Whether it's attitude, elixir, or a combination of both, it certainly looks like it's working!

Super greens... After super swim.