Elon Musk has admitted to using prescription ketamine as a vital tool in his daily battle against "extreme stress" and crushing mental lows.

He claims it's the only way to escape the "negative chemical states" that threaten to stall his work at Tesla and SpaceX. But while Musk calls it a necessary fix for high-performance leadership, medical experts and investors are sounding the alarm. Is this the secret to his genius—or a high-stakes risk that could end in disaster?