Lindsay Lohan has claimed tea caused her to fail her recent alcohol test.

The troubled actress is said to have tested positive for the substance earlier this month but Lindsay told pals she hasn't touched any alcoholic beverages and her favourite kombucha tea -which contains a minor amount - was to blame, according to TMZ.

However, Lindsay - who has been ordered to stay inside the confines of her apartment in Venice Beach, California, Until June 29 while she serves a sentence for violating her probation and theft of a necklace - is determined to turn her life around and focus on her career rather than her recent troubles.

She said: "I am responsible, and I'm following the rules and obeying my judge and the Los Angeles judicial system.

"I'd like to do what I must to get my film career back and the respect of directors, actors, writers, studio heads, fans and so on."