Scientists may have unlocked the secret to eternal youth after conducting experiments on OAPs in Israel.

Researchers at Tel Aviv University discovered that healthy adults over the age of 64 began to de-age when placed in pressurised oxygen chambers for 90 minutes per day.

The test patients were subjected to pure oxygen while in the chambers, five days a week for three months – with evidence showing that not only had the ageing process been delayed, it was actually reversed.

Professor Shai Efrati from the Tel Aviv University led the research along with a team from Shamir Medical Centre with their findings now giving hope that a range of diseases including cancer could be defeated by the new treatment.

The Jerusalem Post has reported on the research, quoting the scientists who said: "The study focused on whether the process could reverse two key indicators of biological ageing, the shortening of DNA telomeres and the accumulation of resultant senescent cells."

Scientists discovered pressurised chambers and pure oxgyen encouraged older patients to 'de-age'

They continued: "A telomere is the end of a chromosome. Telomeres are made of repetitive sequences of non-coding DNA that serve as bumpers to protect the chromosome from damage during replication.

"Every time replication happens, these bumpers take a hit, making them shorter and shorter.

"Once the telomere reaches a certain length, the cell cannot replicate anymore, which leads to senescent cells: ageing, malfunctioning cells that ultimately lead to cognitive or other age-related disabilities and even diseases, such as cancer."

The study involved 35 adults over the age of 64 being given hyperbaric oxygen therapy (HBOT) utilizing 100% oxygen inside pressurised containers.

Scientists monitored the cellular impact of the oxygen treatment by asking the test patients to remove their masks every 20 minutes for five minutes during their treatment cycles.

Their results showed an increase in attention, processing speed, and decision making among those tested.

The scientists state that the results of the changes would mean the participants would have seen their cognitive reflexes being akin to 25-years younger as a result of the treatment.

Professor Efrati said the research "gives hope and opens the door for a lot of young scientists to target ageing as a reversible disease".

He went on to speculate the treatment could cause people to live longer, saying: "We know that people with shorter telomeres die earlier, so it makes sense."