At the age of 94, one of the questions people always ask Dr M is the secret behind his longevity.

When asked about it, his answer would always be the same: stop eating if the food is delicious.

To prove his point, Dr M has revealed a fun fact about himself that we're pretty sure would make all of us jealous.

'I don't eat much'

Dr M told Reuters recently that he's managed to maintain his body weight at 62kg for the past 40 years!

The premiere told the news agency that despite his busy schedule, he tries to do some minor exercise, "but mainly I keep my weight stable.”

“I’ve been 62kg for the past 30 or 40 years, it doesn’t change. I don’t eat very much, and I don’t eat… when food tastes nice. I don’t overeat,” he was quoted as saying.

Despite not having heavy meals, Dr M revealed that he does not feel tired despite his age, simply because he was satisfied by his work.

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We seriously need to talk to Dr M about this, because no matter how many hours we sleep a day, we still feel extremely tired.