Last Friday the Therapeutic Goods Administration made its final decision to uphold the ban, citing evidence that e-cigarette use caused nicotine addiction and could lead to teenagers becoming hooked on tobacco.
The TGA has upheld its decision to ban the use of nicotine in electronic cigarettes.
A group of 16 doctors, academics and public health advocates had tried to reverse the decision, campaigning on grounds that e-cigarettes were a useful tool to help smokers quit.
"It is unethical and unscientific to exempt nicotine in tobacco products and to deny smokers access to a much safer alternative," the group wrote in a submission to the TGA last February.
Dr Colin Mendelsohn is a conjoint associate professor at the University of New South Wales and was one of the researchers who penned the submission.
He said he was disappointed the group had failed to convince the TGA to adopt a policy that could save the lives of thousands of Australians.