Ryder took a supplement called Gaspari Detonate prior to a gym session to help with weight-loss after a friend had used it to great affect.
The decision states Ryder made his own enquiries about the product and sought the assistance of his long-time trainer Stephen Hotter, a conditioning specialist employed by HPSNZ.
On that information, Ryder thought the product did not contain any substances on the Prohibited Substance List and ''began to use it in association with his weekly gym sessions''.
After doing his own preliminary searches, Ryder sent Hotter a text message saying: ''do you know if any of this is a banned substance?''.
Hotter said he would check.
Hotter gave evidence that he checked the World Anti Doping Agency list for three substances in the product on an iPhone application and later on his computer.
He confirmed he told Ryder none of the ingredients appeared to be a banned substance.
''Mr Hotter's evidence was that Mr Ryder then replied 'so it should be ok' or words to that effect to which Mr Hotter agreed.''
Cricket | Jesse Ryder tested positive for stimulant... | Stuff.co.nz