psssf what a load of tosh!!! (not that I mean to insult anyone...but this appears to be an urban myth...or created at a time when water wasn't as clean or the pots used for boiling contained heavy metals)
Even if what people say is true (yet to find any medical studies on this) that reboiling can leave behind concentrated minerals, limscale, magnesium Floride etc every time you reboil, which harms the baby...anyone whos taken high school chemistry will know that these minerals would be left in the kettle too.... so unless every time you put "fresh" water into the kettle, you made sure that the kettle was cleaned and thoroughly de scaled, it won't make much difference.
They say not to microwave formula too...and theres actual scientific studies done on this proving that it breaks down molucles in the milk. But mothers still do it.
tbh though, I'm more worried about the c*ap pumped into the atmosphere by car exhausts and how my child breaths that in more than adults because pushchairs happen to be closer to exhaust levels, than a possibility of slightly increased mineral deposit ingestion.
I mean if any one can find me a medical/scientific journal to read concerning reboiling water and the scientific studies covering it I'd be really interested to read it and would gladly stand corrected.
This is the only thing I've found.
http://nutrition.about.com/od/askyournu ... pwater.htm
and it says it cause no health problems unless you have used unclean ground water...I don't think any of us would feed that to our child if we can help it