Michael Greger

Michael Greger M.D. FACLM, is the Honorary Scientific Advisor of Viva!.

He is a physician, New York Times bestselling author, and internationally recognised professional speaker on a number of important public health issues. Dr Greger has lectured at the Conference on World Affairs, the National Institutes of Health, and the International Bird Flu Summit, testified before the US Congress, appeared on The Dr Oz Show and The Colbert Report, and was invited as an expert witness in defense of Oprah Winfrey at the infamous "meat defamation" trial.

Michael founded and runs the website, nutritionfacts.org  a science-based, non-commercial website that provides free daily videos and articles on the latest discoveries in nutrition.


  • If pregnant crickets are exposed to a predatory wolf spider, their babies will hatch, exhibiting increased antipredator behavior and, as a consequence, improved survival from wolf spider attack. The mother cricket appears to be able to forewarn her babies about the threat when they are still inside her, so they would be pre-adapted to their external environment. This even happens in plants. If you grow two genetically identical plants – one in the sun, one in the shade – the sun-grown plant will produce seeds that grow better in the sun, and the shaded plant will produce seeds that grow better in the shade – even though they’re genetically identical.

    What’s happening is called epigenetics, external factors changing gene expression.

  • Only about one in 10,000 people live to be 100 years old. What’s their secret?