A student was horrified to find brain-like lumps inside her orange juice box after taking a sip of it.
Lauren Howard, 17, told her mum Tracy, 48, that the juice tasted sour and decided to empty it down the sink.
They claimed to have found the red and black substance at the bottom of a brand new, sealed carton of fresh orange juice at her home in Knaresborough, North Yorks.
Feeling traumatised, Lauren said: "I'd gone to get a drink after finishing my tea. I didn't think anything of it - the carton was sealed and the date on top said October 2019.
"The only thing I didn't do was shake it - something my mum always says I should do. I began to pour it into a glass and it was coming out a red, bloody, orange colour.
"I thought it was strange but just put it down to the fact I hadn't shaken it."
She continued: "So I decided to take a sip but something seemed off straight away. It tasted sour and had bits floating in it.
"When I went to pour it away down the sink, I noticed something was blocking it from coming out.
"That's when me and mum decided to cut it open and we saw what was inside.
"Mum took a photo and put it on Facebook because we couldn't work out what it was, it was so gross.
"We've had guesses from brains, to a dead mouse."
Mum Tracy said she bought the juice from Asda two weeks ago - but the carton had more than 12 weeks left before expiring.
Tracy complained directly to the store but says she only received a refund for the price of the item - which was 89p.
Tracy said: "Lauren's been traumatised by the entire thing. That night she barely slept, and she couldn't drink anything, she was just retching.
"She was worried about all drinks and what could be in them, even the tap water.
"None of our family will be drinking juice from the carton again that's for sure."
A spokesperson for Asda said: "We pride ourselves on always offering high quality products to our customers and are very sorry that the carton of juice Ms Howard purchased seems to have unfortunately been damaged and become mouldy.
"We have launched an investigation to understand what could have happened, but can confirm that we have had no other complaints of this nature.
"We have contacted Ms Howard to apologise and keep her updated with our investigations."
