When Natasha Jansen was accused of driving almost five times over the limit, the private school mum convinced a magistrate she had only been drinking a health supplement.

Police now allege Jansen flipped her Mercedes SUV on Sydney‘s lower north shore just weeks after that acquittal while she had the psychoactive component of cannabis in her blood.

As part of her bail conditions, the 49-year-old is not permitted to get behind the wheel of any motor vehicle or even sit in the driver’s seat of one.  

The Daily Mail spotted Jansen on Thursday afternoon being dropped off at her Northbridge home by a chauffeur-driven Kia Carnival hire car.  

The mother-of-two was charged with high-range drink-driving in July 2024 after falling asleep in her Mercedes outside her children’s school sports grounds, also at Northbridge.

Jansen initially recorded a roadside breath test reading of 0.243, then a second one of 0.193 at Chatswood police station.

At court, her lawyer successfully argued Jansen’s high blood alcohol reading could have been caused by her skincare regime, combined with a reflux condition.

Solicitor Michael Bowe told Hornsby Local Court his client had drunk chlorophyll, which caused alcohol in her mouth to register an inaccurately high level.

Magistrate Margaret McGlynn accepted the explanation and dismissed the charge on August 11 this year.

Less than three weeks later, on August 29, Jansen was involved in a crash on Kameruka Road, again at Northbridge.

Pictures taken at the site showed Jansen’s car on its side in the middle of the street with builders from a nearby workplace helping to lift her out of the wreckage.

Police allege Jansen flipped her vehicle after ploughing into two parked cars about 11.30am and that she returned a positive result for alcohol at the scene.

Jansen allegedly refused to undergo a breath test at Chatswood police station and was later charged with negligent driving and failing to submit to a breath analysis.

After police received test results, Jansen was hit with an additional charge on October 27 of driving a vehicle with an illicit drug present in her system.

It can now be revealed that the drug allegedly in her system was delta-9-tetrahydrocannabinol, or THC – the primary psychoactive compound found in cannabis.

Jansen was not required to appear at Hornsby Local Court on Thursday when her latest charges were adjourned until next month. 

She first faced court over the crash allegations on October 16 and is yet to enter pleas to any of the charges. 

In bail court documents obtained by 7News, Jansen said she ‘had a history of alcoholism, is unemployed and has two children as dependents’.

‘The accused appears to have been intoxicated while driving a vehicle leading to a collision that by luck did not result in the injury/death to a person,’ police alleged.

‘The accused willingly failed to respond to legislated obligations placed upon her being the driver of a motor vehicle involved in a collision.’

Police previously said emergency services found Jansen’s overturned vehicle after being called to Kameruka Road following reports of an accident.

‘It was like a movie set to be honest. I heard that the car actually went airborne,’ resident Francoise told 7News.

Police said Jansen was treated at the scene by paramedics for minor injuries.

‘She was subjected to a roadside breath test, which allegedly returned a positive result,’ a spokesman said.

When Jansen faced court on her drink-driving charge in August, neuropharmacology expert Professor Macdonald Christie gave evidence.

Before falling asleep Jansen had consumed two 500ml bottles of Grant’s liquid chlorophyll, available at supermarkets, outside the school, the court heard.

Professor Christie testified the amount Jansen consumed should have left her with a blood alcohol reading of 0.12 or lower – below the 0.15 high-range drink-driving threshold.

The court was told Jansen suffered from a reflux condition, which, according to a police breathalyser expert, could have caused an inaccurate reading if it led her to regurgitate chlorophyll into her mouth

The breathalyser may have reflected the alcohol content in Jansen’s mouth, rather than in her bloodstream.

On those grounds, Mr Bowe argued his client’s condition made it impossible for the court to determine her precise blood alcohol content.

The court was also shown police footage which showed Jansen was steady on her feet and not appearing to exhibit the behaviour of someone five times over the legal limit.

As to why she had nodded off outside the school, Jansen gave evidence she was tired from not sleeping well the previous night.