Rapid Responses to:

LETTERS:
Deborah Charles, Doris Campbell, Marion H Hall, Andy R Ness, and George Davey Smith
Taking folate in pregnancy and risk of maternal breast cancer: Authors' reply
BMJ 2005; 330: 600-b-601-b [Full text]
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[Read Rapid Response] Coloured Pills
Tom Greenfield   (11 March 2005)

Coloured Pills 11 March 2005
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Tom Greenfield,
Osteopath
Canterbury CT1 3RD

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Re: Coloured Pills

The tablets used were different colours. Has it crossed anyone's mind that it might have been the colouring in the tablets and not the folate that caused the insignificant rise in breast cancer? Some excipients in medicines are responsible for side-effects in sensitive people, such as lactose. Azo dyes are known to be carcinogenic. Can the authors confirm whether all the colourings used in this trial are known to be safe?

Competing interests: None declared