Kefir for the Millennium?

One of the smallest slabs at Westminster Abbey bears the most fascinating inscription:

Thomas Parr of ye country of Salopp,

born 1438 A.D lived in ye reigns of ten kings,

Edward IV, Edward V, Richard III,

Henry VII, Henry VIII, Edward VI,

Mary, Elizabeth, James I, Charles I,

buried here November 1635, aged 152 years.