In 1965, 27-year-old Scottish man Angus Barbieri entered Maryfield Hospital in Dundee for medical supervision as doctors attempted to help him lose a substantial amount of weight.

What happened next became one of the most extraordinary documented fasting cases in medical history.

Barbieri went 382 days without solid food, from June 1965 until July 1966. During the fast, Guinness records that he consumed drinks including tea, coffee, water and soda water, along with vitamins and other supplementation.

His weight fell from approximately 214 kilograms (472 pounds) to just 80.74 kilograms (178 pounds). That represents a loss of more than 133 kilograms (294 pounds).

The fast was not something Barbieri carried out casually at home. He was medically supervised, with doctors monitoring his condition and performing regular blood tests and other examinations. A medical paper published in the Postgraduate Medical Journal in 1973 documented the extraordinary 382-day fast in detail.

During the latter part of the fast, Barbieri was even able to remain ambulatory and attend appointments as an outpatient. The doctors documented changes in his blood chemistry and other physiological measurements throughout the process.

When Barbieri finally ended the fast in July 1966, he had reached his target weight of roughly 80 kilograms.

Guinness World Records continues to recognize his case as the longest recorded period without solid food, at 382 days.

What makes the story extraordinary is not simply the length of the fast, but the fact that it was documented medically from beginning to end.

Barbieri went into hospital weighing 214 kilograms—and more than a year later, he walked out at just 80.74 kilograms after spending 382 days without solid food.