It can be pretty compelling to watch how little green coffee beans turn brown, then crack open. Roasting your own coffee is fun, no doubt about it. But go steady as there are health risks involved, especially if you are a heavy consumer of coffee. When you roast the beans yourself, you heat them to about 200 degrees Celsius, whether you’re using a pan, oven, popcorn machine or professional home roaster. That high temperature evaporates the moisture and the beans grow larger, change colour and release their aroma. However, consumer advisors warn that roasting coffee produces acrylamide, a bypro…