According to madehow.com, "Aluminum foil is made from an aluminum alloy which contains between 92 and 99 percent aluminum." We also know that aluminum foil is commonly used for the cooking and the storage of food, as well as for food service packs, and many other everyday uses. The thing about aluminum, though, is that as a metal it is known to be neurotoxic. While this does not necessarily mean that the use of aluminum foil while cooking is necessarily dangerous or toxic, it certainly does mean that we should pay careful attention to our usage of such, and should probably consider some other alternatives to replace our common usage of aluminum foil in the kitchen.
The fact about cooking with aluminum foil is that as Dr. Zubaidy states, "The higher the temperature, the more the leaching. Foil is not suitable for cooking and is not suitable for using with vegetables like tomatoes, citrus juice or spices.” It also has been demonstrated as reported by greenexaminingroom.com that: "Cooking with aluminum foil has been shown to create numerous tiny cracks and flakes in the surface of the aluminum foil as demonstrated with electron microscopy." Taking into account this information, as well as considering that the metal aluminum is toxic, a prudent person would probably want to reduce or eliminate their cooking with aluminum foil for their own safety as well as for safety of others.
As for those that are waiting for definitive studies demonstrating that the consistent usage of aluminum foil products for the storage and/or cooking with foods is conclusively dangerous, they will probably not find satisfaction to such for a considerably long period of time. While we can put into the hands of government, or regulatory agencies, our good health and leave the decisions for our health to them, there is a good reason too for why our Creator gave each of us discretion, judgment, and choice.
It is wise to remember that our world is filled with chemicals that we interact with each and every day, that have also become commonplace through the products that we utilize and that we even ingest. For the most part we are oblivious to the benefits or ill effects of these chemicals or metallic substances, so that when we do become cognizant of such, it is to our benefit to make any needful adjustments to our habits to protect our good health.
Numerous recent medical studies have demonstrated a correlation between aluminum toxicity leading towards osteoporosis as well as contributing to Alzheimer's disease. We know through these studies that we should be especially careful in reducing our exposure to aluminum via inhalation or injection as these have been scientifically demonstrated to be severe irritants to the human body, so we should be mindful that aluminum can be harmful to our body.
We live in a modern world in which we rely consistently on certain things to help provide us with our daily needs, yet, not everything that we utilize on a common basis is as safe as it should be. When it comes to cooking and eating, we should carefully consider our process of food preparation and ingestion, keeping in mind that the better part of valor is to reduce our exposure to things that may be toxic to us, especially if the change to our habits is fairly easy to accommodate.