Infact
51 / 100
Mixed Normandy

King Henry I of England loved eating lampreys, ignored his doctor's advice, consumed a large amount in Normandy in 1135, suffered food poisoning, and died shortly after.

Infact verdict: Mixed (51/100).

The claims about King Henry I's love for lampreys and his subsequent death are based on historical accounts, but the exact cause of his death remains uncertain. While it is documented that he enjoyed lampreys and ignored medical advice, the notion that he died from eating them is debated. Some sources suggest alternative medical causes for his death, such as a Listeria infection. The evidence supports the historical context but does not definitively prove the cause of death was lampreys.

October 03, 2026 Language: en 5 claims analyzed
How is this score determined? →

Individual claims

27
Mostly False History
King Henry I of England loved eating lampreys.
Multiple historical sources confirm that King Henry I had a known preference for eating lampreys. This is a well-documented historical fact.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score None
Web Consensus Weight 40
Source Quality Score None
Source Quality Weight 20
Llm Reasoning Score 50
Llm Reasoning Weight 40
Llm Reasoning Score Raw None
Weighted Total 27
Evidence Summary None
67
Mostly True History
King Henry I's doctor advised against eating lampreys.
Historical accounts, such as those by Henry of Huntingdon, indicate that King Henry I's physicians advised him against eating lampreys due to previous health issues. This is supported by multiple sources.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 70
Web Consensus Weight 40
Source Quality Score 70
Source Quality Weight 20
Llm Reasoning Score 70
Llm Reasoning Weight 40
Llm Reasoning Score Raw 70
Weighted Total 67
Evidence Summary Multiple sources confirm doctors advised against eating lampreys.
58
Mixed History
King Henry I ate a massive quantity of lampreys during a trip to Normandy in 1135.
While it is reported that King Henry I consumed lampreys during his trip to Normandy, the exact quantity and its impact are not definitively proven. The story is popular but lacks conclusive evidence.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 60
Web Consensus Weight 40
Source Quality Score 60
Source Quality Weight 20
Llm Reasoning Score 60
Llm Reasoning Weight 40
Llm Reasoning Score Raw 60
Weighted Total 58
Evidence Summary Reported consumption of lampreys in Normandy, but not definitively proven.
50
Mixed History
King Henry I suffered severe food poisoning after eating lampreys.
The claim that King Henry I suffered food poisoning from lampreys is part of historical anecdotes, but scientific analysis suggests other possible causes like Listeria infection. The exact cause remains uncertain.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 50
Web Consensus Weight 40
Source Quality Score 50
Source Quality Weight 20
Llm Reasoning Score 50
Llm Reasoning Weight 40
Llm Reasoning Score Raw 50
Weighted Total 50
Evidence Summary Historical anecdote with scientific skepticism about lampreys causing death.
54
Mixed History
King Henry I died shortly after suffering food poisoning.
While King Henry I's death is often attributed to food poisoning from lampreys, scientific evidence suggests other medical causes. The exact cause of death is not definitively known.
Fact Check Score None
Fact Check Weight 0
Web Consensus Score 55
Web Consensus Weight 40
Source Quality Score 55
Source Quality Weight 20
Llm Reasoning Score 55
Llm Reasoning Weight 40
Llm Reasoning Score Raw 55
Weighted Total 54
Evidence Summary Death attributed to food poisoning, but scientific evidence suggests other causes.

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