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Luigi Gratton

Our experts

Our doctors, trainers, dietitians and advisory board members include more than 300 internationally recognised experts and key opinion leaders. With specialisations in nutrition, fitness and public health, they guide research that drive product innovation. They educate and train our Herbalife Independent Distributors who then guide and support their customers to achieve their goals and live their best lives.

Global experts

Susan Bowerman-image
Susan Bowerman

M.S., R.D., CSSD, CSOWM, FAND – Senior Director, Worldwide Nutrition Education and Training
Chair, Herbalife Dietetic Advisory Board and Outer Nutrition Advisory Board

Luigi Gratton-image
Luigi Gratton

M.D., MPH – Vice President, Office of Health and Wellness
Chair, Herbalife Nutrition Advisory Board

David Heber-image
David Heber

M.D., Ph.D., FACP, FASN – Chairman, Herbalife Nutrition Institute

John Heiss-image
John Heiss

Ph.D. – Vice President, Global Product Innovation
Member, Herbalife Nutrition Advisory Board


Rocio Medina Badiano-image
Rocio Medina Badiano

M.D. – Cochairperson and Member, Herbalife Nutrition Advisory Board

Dana Ryan-image
Dana Ryan

Ph.D., MA, MBA – Director, Sports Performance, Nutrition and Education Chair, Herbalife Fitness Advisory Board

Gary Small-image
Gary Small

M.D. – Member, Herbalife Nutrition Advisory Board