In a finding that perplexed even the researchers, a UCLA study has found that regular use of marijuana does not increase the risk of lung cancer.

The study, which compared about 1200 patients suffering from lung, head and neck cancer with an equivalent number of people without cancer and found no evidence to suggest that even heavy marijuana users had an increased risk of lung cancer.

The reason for the results being so perpelxing is because other studies have shown that marijuana smoke contains even more of the carcinogens that cause lung cancer, than does cigarette smoke.

While the results are encouraging from a lung cancer perspective, it should probably be remembered that other studies have made very different conclusions and that most medicos still accept that marijuana use can lead to other medical problems such as bronchitis.