By Alexandra Sifferlin
April 24, 2014

The 2014 TIME 100 list–the annual determination of people who influenced the world in the past year for better or worse–is here, and we highlight the leaders making a difference in health.

This year, TIME recognizes innovators who tackled issues from hunger and maternal health to marijuana and aging.

  • Christy Turlington Burns, an ambassador for maternal health. Burns founded Every Mother Counts, which provides poor countries with health education, medicine and emergency care.
  • Ertharin Cousin, a Chicagoan who helps feed the world. As head of the U.N.’s World Food Program, Cousin is responsible for feeding over 100 million people each year.
  • Aliko Dangote, doing well and doing good for Africa. Dangote is one of the richest men in Africa who also dedicates his time to ridding countries of infectious diseases.
  • Robert Lanza, in the vanguard of stem-cell research. Dr. Lanza is the chief scientific officer at the biotech firm Advanced Cell Technology, and found a way to turn adult cells into stem cells that may soon be turned into new treatments, or cures, for diseases like diabetes and Alzheimer’s.
  • José Mujica, the revolutionary who legalized pot. As Uruguay’s president, José “Pepe” Mujica signed a law making the country the first to legalize the production and sale of marijuana.
  • Arunachalam Muruganantham, an unlikely health crusader. Muruganantham designed a simple machine to make sanitary napkins after seeing how hard it was for his wife to get access to affordable ones.
  • David Sinclair, bringing us closer to reversing aging. Sinclair is a genetics professor at Harvard Medical School who discovered a compound that makes old cells act young again.
  • Alice Waters, pioneer of good food for all. As a respected chef, Waters promotes accessible produce for everyone, including for the youngest eaters, with the Edible Schoolyard Project.

Contact us at editors@time.com.

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