I was just reading your article about the link between sulphites and ventricular arrhythmia in the latest newsletter. I could relate to many of the symptoms experienced by Michiko. On several occasions (usually after a dinner party or night out at a restaurant), I've had a similar experience, lying awake that night unable to sleep and my heart pounding for hours. Just like Michiko I felt like I was 'buzzing' as though I'd had some hype-inducing drug. Sometimes I would also feel breathless and I noticed this often happened after drinking white wine or champagne. I'd never heard of anyone else having this experience and wondered what could be causing it. Thanks to this article I now have a good explanation, and will avoid preservative 220. - Michelle, by email