Claim: Ketchup, orange squash, tomatoes, strawberries and grapes all deliver positive Covid-19 lateral flow test results.
Fact-check: Ketchup, squash and fruit do not deliver positive Covid-19 results - Full Fact
Verdict: we know that foods high in acid can break lateral flow tests and cause it to appear "positive". however, research has shown that they very rarely deliver a false positive result when used properly, on people.
Organisation: Full Fact
Author: Tom Norton
Date published: 2021-06-29T00:00:00