Dr Berry, from Israel's Hadassah University Hospital, has based his finding on a research he conducted which found that cannabis could help women with the eating disorder by stimulating appetite.
As a part of his research, Dr Berry, a consultant to the World Health Organisation, conducted a trial using cannabis in an oil form to treat anorexia.
He found that early results showed that the drug stimulated a chemical in the brain boosting appetite in malnourished people.
"It is given in very low doses, no one is going to get high and no one is going over the top," News.com.au quoted him, as telling the Daily Telegraph.
"The brain already has receptors which produce some substances like cannabis. We have found that people who are malnourished don't produce these substances."
"This could help the treatment and speed up the process while the person still receives psychological help," he said.