He’s back… a slimmed-down Rob Kardashian emerges on Instagram

Accompanied by his sister, Kim, he was recently spotted partaking in a gruelling hike around the Hollywood Hills area of Los Angeles. 

Now Rob Kardashian has offered his fans further insight into his weight-loss journey: he posted a slimmed-down snap to his much-neglected Instagram account earlier today.

Showing him in front of a plate of cucumber slices, Rob's face certainly looks less bloated and heavy than it has done in recent years.

Wearing a black cap and black t-shirt, his toned arms are also on display.

And while the 28-year-old captioned the photo "way off," his fans were nevertheless quick to offer their encouragement and support.

"Well done, Rob," said one, with another echoing the sentiments of many via a simple: "Looking good," message. 

A third stated: "Nothing worth doing was ever easy @robkardashian you're an inspiration!! Go you!! Xxxx"

Earlier in the week, Mr Kardashian also posted his very first selfie: a brooding black-and-white shot in which his significantly less hefty frame is also apparent. 

“Rob is doing very well," close confidant Malika Haqq told E! in response to the picture. "He has been working out and taking care of himself."

Unlike the rest of his mega-famous family, the former reality TV star has rarely been seen in public over the last few years.

His mother, Kris Jenner, and his elder sisters Kourtney, Kim, and Khloe Kardashian, have often spoken of their worry for Rob's health.

It is thought that earlier this year, before he embarked on his most recent exercise and healthy-eating programme, his weight ballooned to a high of 300lbs (136kg).

Rob stopped featuring on Keeping Up With The Kardashians back in 2013.