Online weight loss brands Juniper and Pilot will soon begin selling replica Ozempic, defying health warnings from its manufacturer and medical regulators, as Australians face a year with the weight loss drug in vanishingly short supply.

The two brands, which are run by the $560 million Woolworths-backed telehealth start-up Eucalyptus, will have a version of the drug made at two Australian compounding pharmacies in a move that could upend the local market.