A mom whose four-year-old daughter was left ‘floppy and unconscious’ after drinking a popular iced drink has joined experts in warning of the dangers of the beverage for young children.

Kim Moore, from the UK, was with her daughter, Marnie, at a children’s party when the little girl suddenly fell unconscious.

Terrified and unable to wake Marnie up, the 35-year-old mom-of-two rushed Marnie and her older sister, Orla, to hospital, where doctors discovered Marnie’s blood sugar levels were dangerously low.

As they looked into Marnie’s condition, doctors determined her low blood sugar levels had been caused by the drink she’d consumed just minutes before she fell unconscious – a simple, much-loved slushy.

Kim Moore was initially confused over her daughter’s sudden illness (Kennedy News and Media)

Moore explained: “We ended up buying two one-litre refillable cups and they were going off playing, eating, getting drinks and coming back but Marnie didn’t drink the full cup, probably only half.

“Then about 10 minutes later, she started getting really aggravated then she started falling asleep so I just thought she was over-tired. It was only five minutes later when I tried to wake her up that I realized she wasn’t waking up and was actually unconscious. She’d gone really pale.”

Marnie was unconscious for around 25 minutes while doctors worked to bring up her blood sugar levels, and she ended up staying in hospital for three days in total.