Josh Ellis 25, was addicted to both substances for nearly two years.
He is now almost 2,000 hours clean from drugs - more than 80 days - after getting help and being supported by Vulnerable Citizen Support Leeds, a charity based in the city fronted by Hayden Lee.
He has even started to work as a landscaper thanks to help from the charity, who helped him find somewhere to live.
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Photographs taken of Josh when he was an addict in contrast to this week have garnered huge reaction on social media in Leeds.
Many people have praised his heroic efforts so far.
Vulnerable Citizen Support C.I.C aims to help the most destitute people in society.
They provide food parcels to struggling individuals and families and assist in finding accommodation for anybody who needs it.
Their slogan is "Homeless Not Helpless".
The group found Josh on the streets of Leeds - outside a Greggs store in a sleeping bag on Kirkstall Road.
Josh is now more than 80 days clean and his journey has been documented on their social media page.
Hayden said: "We just knew he needed a chance."
Josh had been visiting the support unit at the charity for two weeks prior to being taken in by the group.
He told the Yorkshire Evening Post he used to spend up to 80 pound a day on drugs.
Since the intervention of the charity, Josh now has somewhere to live, fresh clothes and a new start in life.
He has even helped the charity and Leeds chef Dale Spink prepare meals for youngsters across the city.
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