Doctors expected Angus Barbieri’s fast to last a short time.
Instead, it lasted 382 days.
In 1965, the 27-year-old Scot began a medically supervised fast through Maryfield Hospital in Dundee. Guinness says he went from 456 pounds to about 180 pounds, living on tea, coffee, water, soda water, and vitamins during the process.
The viral versions usually simplify it as “he ate nothing for a year.” The fuller story is that he went without solid food, while doctors monitored him and he took supplemental intake. That is a big difference — and an important one.
When the fast finally ended, the detail people always remember is his first solid meal: a boiled egg and a slice of buttered bread.
It remains one of the most extreme medical weight-loss cases ever documented — and also one that should never be mistaken for something casual or safe to copy.
Sources: Guinness World Records; widely cited medical case summaries of Angus Barbieri’s fast.
What surprises you more — the 382 days, or the fact that his first meal back was so small?
The Reality of the Fast
- The Doctors’ Expectations: According to the formal medical case report published in the Postgraduate Medical Journal in 1973, physicians prescribed a short fast because they assumed a prolonged period without food would be impossible or too dangerous. They only agreed to extend it because Barbieri’s body adapted remarkably well and he felt no urge to eat. [1, 2]
- Strict Medical Oversight: Barbieri did not starve himself in isolation. He lived mostly at home but regularly visited the hospital for blood tests, stool samples, and medical evaluations. [1, 2, 3, 4, 5]
- Nutritional Supplements: To keep him alive, doctors prescribed vital non-caloric nutrients. He consumed water, clear tea, black coffee, soda water, vitamins, and essential minerals (including potassium and sodium). [1, 2]
- Biological Fuel: Because Barbieri was severely obese, his body safely entered a state of prolonged ketosis, burning his massive stored fat reserves for energy. [1, 2]
- The Outcome: He successfully dropped from 456 pounds (207 kg) to his ideal weight of 180 pounds (82 kg). He broke his year-long fast with a single boiled egg and a slice of buttered bread, and he maintained a healthy weight for the rest of his life. [1]
A Dangerous Exception
While Barbieri survived with zero adverse effects, modern doctors strictly warn against attempting this. During the 1960s and 70s, other medical trials utilizing total starvation treatment for obesity resulted in multiple patient fatalities due to sudden heart failure or severe electrolyte imbalances. [1, 2, 3, 4]
