Secret to eternal youth? John Cleese extols virtues of stem cell treatment

Therapy has remarkable medical potential but experts say private clinics making far-reaching claims operate in regulatory grey zone

Stem cells have become a favoured miracle treatment among the rich and famous, with Kim Kardashian reportedly a fan of stem cell facials and Cristiano Ronaldo turning to stem cell injections after a hamstring injury.

The latest to extol their benefits is the Monty Python actor John Cleese, who suggests that stem cells could hold the secret to eternal youth – or, at least, buy him “a few extra years”.

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