The Adulteration
Files
British food law permits more substitution than most people realise. Chocolate may contain vegetable fat instead of cocoa butter. Ice cream need contain no milk at all. None of this is illegal — that is precisely the point.
These investigations set out what the law actually says, what the official data shows, and what the published research does and does not establish. Every claim is graded.
How we grade every claim
Documented Law
UK statute, quoted and linked to legislation.gov.uk.
Hard Data
Official statistics from AHDB, DEFRA, ONS or the FSA — always dated.
Peer-Reviewed
Published studies, with cohort size and effect size. Association, not proof.
Contested Hypothesis
A live scientific idea, named and dated, not treated as settled.
The Adulteration Files: What British Food Law Actually Permits
Chocolate can be 5% vegetable fat. Ice cream can legally contain no milk at all. None of this is illegal — that's the point. An introduction to a new investigative strand, and the evidence-grading system built to survive scrutiny.
The Five Percent Rule: How Much of Your Chocolate Bar Is Legally Allowed to Not Be Chocolate
British law lets a 'milk chocolate' bar be up to 5% vegetable fat instead of cocoa butter. It's entirely legal, it's been true since 2003, and the schedule that lists which fats qualify is one most shoppers have never seen.
The Ice Cream You Think You're Buying: Britain Had a Legal Definition, Then Quietly Removed It
Britain once defined 'Dairy Ice Cream' in law: a minimum fat content, and a requirement that the fat be exclusively milk fat. Between 2014 and 2018 that definition was revoked. Nobody replaced it. Here's what's sold under the name now.
The Filled Dairy Loop: Why British Milk Fat Keeps Losing to Vegetable Fat
1,190 British dairy farms closed in five years while the national herd barely moved. Farmgate and wholesale butter prices have collapsed. And the law already gives manufacturers a standing legal alternative to milk fat. Here's how those facts connect.
Food and the Brain: What the Evidence Actually Says
The Lancet says up to 45% of dementia cases are potentially preventable. Diet isn't on that list of 14 risk factors directly — but four of the factors it does include are shaped by what you eat. Here's the real chain of reasoning, and what the evidence does not show.
How to Read a Food Label: The Checkable Rules
Which words on a UK food label are legally protected, and which ones mean almost nothing at all. A practical, visual companion to the rest of the Adulteration Files — no legislation-reading required.
What the Healthy Countries Do Differently
Japan has the lowest obesity rate and the oldest population in the developed world, and a law requiring schools to teach children about food and feed them properly. That's policy, not genetics — but the honest version of this story is more complicated than the headline, and includes a warning built into Japan's own recent history.
The Labour Behind the Milk
Even a dairy farm that wants to keep making real milk increasingly can't staff the parlour. 82.4% of farmers who advertised a dairy vacancy in Arla's latest survey say almost no applicant had the right skills — a figure that hasn't dropped below 80% in seven years. Price collapse and a labour shortfall are two separate pressures closing on the same industry.
The Warrington Patent
The technology that lets manufacturers swap milk fat and cocoa butter for cheap vegetable fat wasn't built by a faceless multinational. It was built into a working factory for the first time by a soap company in Warrington, Cheshire, in 1909. This is where it started.
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