A man who put millionaire Bryan Johnson's age-reversing lifestyle to the test said he was stunned by the results - and saw the benefits almost immediately. 

Fascinated by the tech titan and his use of biohacking, Andrew Boyd, 23, decided to try the bizarre Blueprint diet and document his 75-day journey on his YouTube channel Project Andrew.

According to Andrew, who is from Chattanooga, Tennessee, he felt 'incredible' after just a week on the Blueprint diet, losing an average of six pounds and averaged a 95 per cent sleep score, inspiring him to continue for a further 75 days.