Robert’s wake-up call came when he couldn’t enjoy a family trip to Universal Studios because of his weight, 500 lbs (227 kg) at the time. But it took eight months before he took action and began a keto diet, intermittent fasting and also started tracking his food.

Once he got started, however, the 250 pound (113 kg) weight loss was apparently easy:

When I reflect on my weight loss and where I came from, I think of a movie line from Apollo 13. It’s when Tom Hanks is talking to Kathleen Quinlan after their party looking at the moon, and what it took to get there: ‘It’s not a miracle. We just decided to go.’ I just decided to go.

Men’s Health: This guy was 500 pounds. Then he cut calories and lost half his body weight.

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