A woman has claimed that she started to lose her sight after drinking dozens of cans of Red Bull every day.

Lena Lupari, 26, has gained so much weight from drinking seven litres of the energy drink that her brain has swollen.

The mother-of-three was ingesting 3,000 calories every day and was unaware of the harm she was doing to her body until she collapsed in June.

She told the MailOnline: "I used to drink 28 cans of Red Bull in a day and I'd only have a meal at night but it would usually be something fast-food like a takeaway or a packet of pasta.

"I've got three young children, one with special needs, and didn't have time to make anything.

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"I'd been suffering from migraines and headaches for about five years but I just ignored them and took painkillers.

"Then my vision went and I couldn't even lift my head off the bed and I ended up in hospital for six days."

Doctors then revealed that her wright-gain had led to a condition know as Idiopathic intracranial hypertension, a condition which causes the brain to swell because of high pressure in the skull.

Common symptoms include severe headaches and changes in vision due to swollen optic nerves.

At her peak, Lupari was spending £6,000 on the soft drink every year.

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Consultants have now handed her an ultimatum, insisting that she lose eight stone or risk serious harm to her health.

She said: "I don't want a gastric band or surgery but I think they should offer help for someone with this and to motivate them - something like a boot camp.

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"Losing the weight doesn't mean it will go away forever but it means I won't need surgery."

A typical can of Red Bull contains 80mg of caffeine, a stimulant, which raises the heart rate.