Hi @Guia_de_tendencias, thanks for sharing. The inner layer of the packaging, the layer that comes in contact with the product, is polyethylene (PE), not aluminium. Although you shouldn't eat the packages, they're not dangerous to your health and will not have been the cause of your elevated blood aluminium levels.
Please note that whilst Jake is tested for heavy metals, hardly any other type of food is. Aluminium is the third most abundant element on earth and is found in all of our food and drinking water. Other than from any other food or water, your elevated blood aluminium levels could be caused by e.g. recent use of aspirin or antacids. Have you by chance used either of these recently?