According to scientists one small cannabis joint won’t harm your health. This recommendation came at the time of the launch of the world’s first ever guidelines on how to take drugs safely.

As per the ground-breaking guide cannabis users won’t face any long-term health issues if they smoke such a small dose.
Experts launched the ‘Safer Use Limits app’ to help reduce harm in those who indulge in illegal substance use.


The aim of launching the new Safer Use Limits app by scientists at Kings College London is to reduce harm among drug users. Through the app people will get to know of the risk their drug-taking poses to their health.


The app reveals cannabis users won’t face any long-term health issues if they smoke just one small joint a week.

A new research of over 40,000 cannabis users found one small joint a week makes long-term health problems unlikely.

Only pregnant women or mentally ill people are more vulnerable, says an addiction specialist.

The app launched by Dr Adam Winstock, a consultant psychiatrist and addiction medicine specialist—is based on the experiences and results of the Global Drugs Survey.

It instructs cannabis users regarding how to reduce their risk of ill-health by quizzing them on the quantity and frequency they use the drug – much like the Government’s alcohol consumption guidelines.


Dr Winstock, a lecturer at King’s College in London, said: ‘The Global Drug Survey states categorically that the only way to avoid all harm from drug use is to not use them whatsoever.

‘However, it’s not a very practical goal for people who like to indulge in drugs.

As per the new research by the Global Drugs Survey four in ten cannabis users smoked it more than 100 times a year.

Such usage puts them at risk of lower health harm, with potential impacts upon memory, mood, lung health, mental health and motivation.

Concurrently, a shocking one in 20 smoked cannabis every day – putting them at very high risk of dependence, withdrawal, negative impact on interpersonal relationships, ageing and motivation.


Scientists feel recommendations from the app could be more convincing to drug users than from medics.

Safer limits guidelines on MDMA, cocaine and ketamine will follow suit soon.

Wayne Hall, professor, director and inaugural chair at the Centre for Youth Substance Abuse Research at The University of Queensland, hopes recommendations drawn from the app could be more convincing to cannabis users than recommendations from medical professionals.