Why We Age And How We Can Stop It – The Hayflick Limit

Professor Leonard Hayflick talks about his discovery, The Hayflick Limit.

And activities then centered on the chromosomal characterization of the cells because it was by this time learned that as the cells approached their limited capacity to replicate, a state that I call phase 3, I described the lineage of the cell populations as phase 1, which is the period of the primary culture, phase 2 is the 40 or so period where the cells are actively dividing and phase 3 is a period when the cells have stopped dividing.

People generally have called the phase 3 the hayflick limit, perhaps I should say a word about the derivation of that term. The derivation occurred in the mid 60s by a gentleman well known in the scientific field at least at that time, Sir MacFarlane Burnet, an Australian Nobel Prize laureate who knew about my work and indeed made a visit to the Wistar Institute to see Hilary at one time and I was introduced to him then. He went on to write books in several fields outside of the one that he was expert in, which namely immunology, and he did a book in which he discussed aging. And in that book he called what I had observed the hayflick limit, which is the origin of that term. So I have Sir MacFarlane Burnet to either thank or not for the use of that term.

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Katherine Baltazar

I am a media reporter writing for the Hair, Beauty and Spa Industry. I've been writing and covering salons, beauty products and hair treatments for the pace 5 years.