None of us are getting any younger, but now a pill that reverses ageing could be on the shelves as soon as 2020 as researchers make a ?revolutionary? step forward in anti-ageing technology.

The revolutionary drug has caught the attention of NASA as they hope to defend Mars-bound astronauts against the effects of radiation.

After successfully being used on mice the researchers believe it could be tested on humans within six months.

Lead scientist Professor David Sinclair said: ?This is the closest we are to a safe and effective anti-ageing drug that?s perhaps only three to five years away from being on the market if the trials go well.

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