Kit Roberts
A self-described 'biohacker' has opened up about his secret for when it's best to consume coffee to benefit your health.
Tech multi-millionaire Bryan Johnson has made no secret of his plans to try and 'live forever'.
So far, Johnson's strategies for prolonging his life as much as possible have included some extremely unusual ideas, not least using some of his own son's blood.
Johnson's daily morning routine would also be enough to leave even the most chirpy of early birds dashing back under the covers, including blue light therapy, red light therapy, UV light exposure, and numerous supplements.
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Needless to say, his diet is also very strictly controlled, and he is extremely particular about what he consumes, with lots of vegetables and supplements.
But what about his thoughts on having a cup of coffee?
Johnson shared a new study which explored the effects of drinking coffee on increasing life expectancy.
This sampled some 40,725 adults across the US as part of the US National Health and Nutrition Examination Survey (NHANES), which was carried out over 20 years between 1999 and 2018.
The study indicated that people who drink coffee had a 16 per cent lower risk of death from any cause, as well as being 31 per cent less at risk from cardiovascular disease compared to non-coffee drinkers.
Speaking at the time, lead author Dr Lu Qi said: "This is the first study testing coffee drinking timing patterns and health outcomes.
"Our findings indicate it's not just whether you drink coffee or how much you drink, but the time of day when you drink coffee that's important.
"We don't typically give advice about timing in our dietary guidance, but perhaps we should be thinking about this in the future."
But, Johnson has said, there's a catch.
This is that it depends massively on the time of day that you actually drink the coffee.
If you drink it in the morning, then you receive the health benefits, but less so in the afternoon and evening.
Johnson warned on social media that drinking caffeine in the afternoon may see you 'lose out' on the benefits to longevity.
"Caffeine has a five-to-six-hour half-life in your body," he explained.
"That means a cup of coffee at 3pm leaves half a cup of coffee in your body at 9pm.
"That lingering caffeine in your system can wreck your sleep.
"And if I haven't said this enough, sleep is the number one thing you can do for your overall health."