An Awsworth man was part of a criminal gang who used a shop to run a drugs supply operation.
Police forces across the East Midlands and the north of England were involved in the detection of the conspiracy, seizing kilos of amphetamine and cocaine in the process.
A total of 12 people were convicted for their involvement in the plot with most of them sentenced to jail at Nottingham Crown Court.
Joshua Patchett, 29, of Station Road, Awsworth, pleaded guilty to conspiracy to supply cocaine. He will be sentenced next month.
In July last year a van was stopped on the A1 near Doncaster containing ten kilos of amphetamine, worth an estimated £227,000. The resultant investigation linked the drugs to the Protein Masters store in King Street, in Sutton-in-Ashfield, and a warrant was executed at the shop a few weeks later.
More than seven kilos of a substance in residue form which contained amphetamine was found in buckets, drains and toilets within Protein Masters.
Also recovered was a vacuum packing machine and mixing tools, like those used in the construction industry.