Intended for healthcare professionals

Rapid response to:

Letters

Taking folate in pregnancy and risk of maternal breast cancer

BMJ 2005; 330 doi: https://doi.org/10.1136/bmj.330.7491.600-b (Published 10 March 2005) Cite this as: BMJ 2005;330:600

Rapid Response:

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

Competing interests: No competing interests

11 March 2005
Tom Greenfield
Osteopath
Canterbury CT1 3RD