Why is aluminium not safe for cooking?

Could you elaborate on why aluminium is considered unsafe for cooking? Are there specific health risks associated with using aluminium cookware? How does the interaction between food and aluminium affect our bodies? Are there any alternative materials that are safer to use for cooking purposes? Additionally, are there any circumstances where it might still be acceptable to use aluminium cookware, or are there always better options available? I'm eager to understand the full picture behind this topic.