ZEN Graphene Solutions Ltd.: ZEN Graphene Solutions and Trebor RX Announce Successful Inhalation Safety Testing of ZENGuard-Enhanced Surgical Masks and Final Submission to Health Canada ZEN" or the " Company") (TSXV:ZEN)(OTC PINK:ZENYF), a Canadian, next-gen nanomaterials technology company and Trebor Rx Corp. (Trebor) are pleased to announce successful inhalation safety testing results of ZENGuard TM-enhanced surgical masks and submission of these results to Health Canada. Testing was completed by NanoSafe Inc. (NanoSafe) in Blacksburg, Virginia confirmed that no ZENGuard TM graphene material was released from the surgical masks with air flow rates simulating resting and light activity inhalation rates. The test results submitted to Health Canada are the final item from the information request ZEN received following the April 2 advisory. Health Canada is reviewing the application as a priority item with a decision expected shortly.