You are right about the nitrates Angel. I've done a bit of reading on this. Apparently the nitrates seep out into the water as the veggies are boiled and the longer they are boiled, the more nitrates and nutrients that will release as well. My mom always told me not to use the water from the veggies, don't know how she knew this as this info wasn't readily available in her times, she's a wise woman!! Theres probably more nitates in veggies than even bacon.. shocking I know. Veggies absorb the nitrogen from the nitrate thats in the soil, thats the main reason why cabbage, spinach, celery, beets etc. tend to have more nitrates. Experts will probably disagree how much nitrates we are actually ingesting from the food we eat, maybe the amount that we are getting from the boiled water is not enough to adversely affect our health. But as a rule if thumb I don't use the water to puree the veggies. I'm a little paranoid about things like this though. The amount of nitrate might not even be enough to affect Sophie, but with the info I have read I won't use the water. But this is just my preference. At the end of the day us mommies will do what we think is right for our babies. Oh, I forgot to mention that even most of the fertilizers the vegetables grow in have nitrates! lol.