2 Wrapping cold food in aluminum foil is safe
The researchers also mentioned that aluminum wrapping of cold food is safe as the leaching was only observed upon heating. It did not make a difference on which side the food was placed, the shiny or dull side.
Unusually high levels of aluminum in the body can cause mineralization of bone, matrix formation, and parathyroid and negative bone cell activity. The most common symptom of high levels of aluminum in the body and the dangers of aluminum foil is hypercalcaemia or high levels of calcium in the blood.