Gerontology Wiki

The traditional GRG website (started in 1990)

GRG upgrade

The modern upgraded GRG website (2022-present)

The Gerontology Research Group (GRG) was started in 1990 by Dr. L. Stephen Coles and Stephen Kaye as a group of researchers in gerontology who meet monthly at UCLA in Los Angeles, California.[1]


In 1995, the GRG added the website, and in 1997 began tracking the world's oldest validated living people.

In 2000, the Gerontology Research Group became the gerontology consultant for Guinness World Records. [2][3] The group tracks people over the age of 110.[4]

The group was co-founded by L. Stephen Coles who is the Director and Treasurer of the Supercentenarian Research Foundation.[5] [6] The other co-founder was Steven M. Kaye.[1] Editions of the Guinness World Records through the year 2008 indicate that the the Gerontology Research Group is used as its authority for its "World's Oldest Living People" category, which the group verifies using birth and marriage certificates.[7][3][8][9]

The New York Times wrote that the GRG has been recognized as an authority on the matter of verifying supercentenarians.[9][10] The group started as an organization to investigate the limits of life spans in all mammalian species, and around 1998-1999 they started a committee to investigate claims to find out who was the oldest person at any point in time.[3]

In November 2022, the GRG launched a new website for its Supercentenarian Research and Database Division, marking a major upgrade and a new era in its research and mission for over three decades.

In January 2023, the GRG was responsible for creating the World Supercentenarian Forum, the online community meant to study topics related to human longevity, gerontology, and supercentenarians, by respecting the guidelines of mutual respect, and scientific integrity.

As of 1 June 2024, the organization is monitoring 161 people whom they have validated as living supercentenarians, of whom 147 are female and 14 are male.[11] This does not include additional pending claims under investigation.


Current membership, which is over 500 persons, in the GRG includes:

  • GRG Executive Director (2014-present) Johnny Adams; GRG system operator, business administator; GRG member (2000-present)
  • Robert Young, Director, GRG Supercentenarian Research and Database Division (2015-present), M.A., M.A., USA; GRG member (1999-present)
  • Dr. Aubrey DeGrey, founder of SENS, USA-UK
  • Dr. Leonid Gavrilov (University of Chicago)[12]
  • Stan Primmer, M.A., USA
  • Gert Jan Kuiper, Netherlands (2002-present)
  • Dr. Jean-Marie Robine, France (2002-present)
  • Miguel Quesada, Spain (2004-present)
  • Emilio Ibanez, Spain (2004-present)
  • Thomas Breining, Germany (2004-present)
  • Stefan Jamin, Germany (2008-present)
  • Peter Vermaelen, Belgium (2008-present)
  • Dr. Luc de Lay, France (2009-present)
  • Mark E. Muir, USA (2011-present)
  • Waclaw Jan Kroczek, DMD., Poland and the Nordic Countries (2013-present)
  • Dr. Harold Katcher, USA
  • Dr. Leonard Hayflick
  • Dr. George Church, USA
  • Dr. John McCormack, Australia
  • Jennie Jimenez, Puerto Rico (2015-present)
  • Ricardo Pereira Lago, Brazil (2015-present)
  • Nicolas Ruiz Moreno, Argentina (2015-present)
  • Victor Bjoerk, Sweden (2016-present)
  • Tiago José Soares Silva, Brazil (2016-present)
  • Flavio Stuber, Switzerland (2016-present)
  • Dr. Anthony Medford, PhD, Barbados (2017-present)
  • Gerson Dias, Brazil (2020-present)
  • Ollie Trim, UK (2022-present)
  • Dejan Vujić, Serbia (2023-present)
  • Alfredo Nocera, Italy (2023-present)
  • Dr. Ármann Jakobsson, PhD, Iceland (2023-present)
  • Heather MacAlister, South Africa (2023-present)
  • Sylvain Grosgeorge, France (2023-present)
  • Dr. Angelo Jose Goncalves Bos, Brazil (2023-present)
  • Gordei Korjak, Estonia (2023-present)
  • Adam Komenda, Czech Republic (2023-present)
  • Dawid Skalec, Poland (2023-present)
  • Jair Van Dijk, Netherlands (2023-present)
  • Guilherme Matheus da Sousa, Brazil (2023-present)
  • Pierre Jacob, France (2024-present)
  • Mihai Matei, Romania (2024-present)
  • Brian Hsu, Taiwan (2024-present)

Former members[]

  • L. Stephen Coles, USA (1990-2014), deceased
  • Celvin Ruisdael, Norway (2002-2012), deceased
  • Melissa Page, UK (2008-2015), deceased

See also[]


  1. 1.0 1.1 Kaye, Steven M. "General Concepts for Directions to Proceed with the 21st Century Biotechnology Group.". Joint Venture Partners. Retrieved 31 October 2007. Much of the philosophy and technological developments described above, have come from the doctors and scientists participating in the Gerontological Research Group in Los Angeles. Gerontological Research, co-founded in 1992 by Steven M. Kaye, MD and Stephen Coles, MD, PhD., has become a "Rand Corporation" think tank for life extension research and development. The JVP Venture Fund Biotechnology Group has full access to the world’s most advanced thinking, and visionary medical scientists. 
  2. "Odds of reaching 100 get better" according to The Gerontology Research Group, a nonprofit volunteer organization" (Pittsburgh Tribune Review, 1 June 2006)
  3. 3.0 3.1 3.2 "Research group tracks oldest-living people.". Daily Bruin. 10 June 2004. Retrieved 31 October 2007. They are searching for an alternate route to immortality other than the fountain of youth. The group works closely with the Guinness Book of World Records and is now considered the primary source for verifying the world’s oldest person for the annual records’book. Coles added that about a year ago, the Guinness Book began to recognize the group as the primary source for verifying the ages of people. 
  4. "One of oldest Portuguese women, 110, dies.". Modesto Bee. 9 November 2007. Retrieved 31 October 2007. ... according to the Gerontology Research Group. Mrs. Sanders spent the last decade of her life at the La Sierra Care Center in Merced, ... 
  5. "Supercentenarian Research Foundation". Gerontology Research Group. Retrieved 31 October 2007. "L. Stephen Coles, M.D., Ph.D., Director and Treasurer of the Supercentenarian Research Foundation" 
  6. "Researchers Work to Crack Code of Long Life". Web MD. Retrieved 31 October 2007. People don't live to be 110 "because they don't age; it's a fortuitous, genetic roll of the dice, so there is not an intervention available to people who are still alive," says L. Stephen Coles, MD, PhD, a gerontologist with the Los Angeles Gerontology Research Group at UCLA. 
  7. "Guinness World Records 2008". 2008. pp. p. 67. ISBN 1-904994-19-9. 
  8. Zaslow, Jeffrey (28 February 2005). "Gerontology sleuths search for 'supercentenarians'". Wall Street Journal. Pittsburgh Post-Gazette. Retrieved 31 October 2007. Her ripe old age was "a falsehood perpetrated by the tourism industry there," says GRG co-founder L. Stephen Coles, a physician and stem-cell researcher at UCLA's David Geffen School of Medicine, where GRG is based. GRG counts just 12 undisputed cases of people ever reaching 115. ... The 14-year-old GRG, which the Guinness World Records Book now relies on to confirm longevity records. ... 
  9. 9.0 9.1 "Researchers are studying what causes some people -- such as two OC..." (Orange County Register). Coles is co-founder of the Los Angeles Gerontology Research Group, which verifies supercentenarian ages for Guinness world Records using birth and marriage"...
  10. "In Connecticut, World's Oldest Woman Dies at 114.". New York Times. 30 January 2007. Retrieved 31 October 2007. In the last month alone, the title of oldest person has changed hands three times, according to the Gerontology Research Group, an authority on the matter. 'The Guinness Book of World Records will not be able to keep up,' said Dr. L. Stephen Coles of the University of California, Los Angeles, the executive director of the group. 'This has been a pretty volatile time. Usually we’ve had a more stable No. 1 position.' 
  11. GRG World Supercentenarian Rankings List Gerontology Research Group
  12. Unraveling the Secrets of Human Longevity Longevity Science Foundation

External links[]