Ask Your Own Body
I know I'm commenting two years after this thread ended, but I want to add something very important that I didn't see mentioned for the sake of those still reading this thread today.
Reviewing scientific studies about which fuels and techniques make the healthiest barbeques can be helpful, but our own bodies knows more about chemistry than any human scientists do and have our own best interests at heart more than any paid researchers do.
Our bodies don’t talk to us in words, but they do talk to us through feelings, and if you will learn to pay attention, you can understand what your own body tells you.
For me, when I eat meat barbequed over propane, the black slick that develops on the meat and gets on my hands and plates is not appealing to me when I look at it. When I wash it off the meat, I still sometimes get mild headaches that last several hours. When I don’t wash this off the meat, the headaches, if they occur, are more intense. For me, my body is telling me to stay away from propane barbequing.
When I eat meat barbequed over an electric grill, there are no disagreeable physical side effects noticed around the meal. The food tastes good but somehow sterile. For me, this is my body telling me cooking this way is just fine healthwise, but there must be a better way to barbeque.
When I eat meat barbequed over charcoal briquettes that are not completely ashed over, I can really smell the coal and other ingredients of the briquettes and taste these flavors in my meat. I feel a mild revulsion to these smells, flavors, and my energy level depresses slightly. If I wait until the coals are ashed over to begin cooking, any disagreeableness mentioned is barely barely noticeable and the food tastes good. For me, my body is telling me if I use charcoal briquettes, cook on them after they're ashed over.
When I eat meat barbequed over 100 percent wood lump charcoal that was not completely ashed over, I taste soot in my food, but there is no other disagreeableness. When the lump charcoal is ashed over before cooking, the food tastes great. For me, my body is telling me if I use 100 percent wood lump charcoal, the more ashed over the coals are before cooking, the better. (The problem is there's not much cooking time left if I wait until the lump charcoal is completely ashed over).
When I eat meat barbequed over clean firewood burned down to coals, the smell and taste of the food is heavenly, and my energy is enhanced. For me, my body is telling me this is the ideal way to go.
Since this is the Barbeque Brethren forum, and the name implies an almost religious reverence to barbequing, I want to add one more interesting thing. In the Bible, Jesus, the master healer, who would know if barbequing over wood coals was healthy or not, obviously approved (John 21:9) since he did it himself.
I hope this helps you understand better how your own body can help you know the best way for you to barbeque. Your own body's opinion on these things is really the most important of all since it's your body that eats your barbeque fare. -Kevin