A millionaire on a crusade to age backwards has suffered a “severe allergic reaction” after injecting another person’s fat into his face. Bryan Johnson, the 47-year-old known for embarking on outlandish health treatments to regain the body of a teenager , saw his face “blow up” to the point where he “couldn’t even see”. Photographs posted by the former tech mogul on Instagram show him squinting out from puffy eyelids, with the rest of his normally chiselled face swollen up like a balloon.

Johnson wanted to restore volume to his face to counteract his strict vegan diet of 1950 calories per day, which had left him looking gaunt. “People thought I was on the brink of death,” he claimed. “It didn’t matter how good my biomarkers were if I didn’t have face fat.

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