HART’s Substack
HARTHART is a group of highly qualified UK doctors, scientists, economists, psychologists and other academic experts, reporting on various aspects on public health, especially in relation to the covid response.
| Platform |  | Pricing | Only free issues | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 855 | Founded | 3 years ago | Last Issue | 5 days ago |
| Active | |||||
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hartuk.substack.comLatest Issues
Chapatti flour and the highest-risk women
Dr Clare Craig
Key points
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Neural tube defect risk is highest among women of Indian and Bangladeshi origin. They are also the least likely to take a folic acid supplement before pregnancy.
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Despite their higher risk the...
Dosage is key to efficacy, so why is it ignored for safety?
Dr Clare Craig
Key points
• The same molecule at different doses can produce different effects and sometimes opposite ones.
• Regulators expect different efficacy by dose including non-linear dose responses
• Safety assessme...
The children who pay the price
Dr Clare Craig
Key points
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The safe upper limit for a child aged one to three is 200 micrograms of folic acid a day.
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For an adult it is 1,000. The limit is precautionary because no safety trials have ever been done.
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At the l...
The AstraZeneca Files
Dr Ros Jones, retired Consultant Paediatrician, convenor Children’s Covid Vaccines Advisory Council
This article was published on 18th July 2026 in the last edition of The Conservative Woman and reproduced the next day on Kathy Gyngell’s n...
How does folate fare during a famine?
Dr Clare Craig
If folate deficiency causes neural tube defects, a famine should produce an increase.
The case for adding folic acid to flour depends on four linked claims:
1. A shortage of folate in the developing brain causes neural tu...
Key Facts
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Authors
The writers behind this newsletter.
We are a group of highly qualified UK drs, scientists, economists, psychologists and other academic experts who came together during the COVID-19 pandemic, concerned about lack of debate and brutal censorship. Science without debate is dogma.
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