But a careful look at the scientific literature shows there is strong evidence humans can also absorb some nutrients from the air.
We propose that breathing supplements our diet with essential nutrients such as iodine, zinc, manganese, and some vitamins.
Research from the 1960s found that laundry workers exposed to iodine in the air had higher iodine levels in their blood and urine.
This is seen in welders, who are exposed to high levels from air and have harmful levels of manganese buildup.
Research published over 70 years ago has shown that aerosolised vitamin B12 can treat vitamin B12 deficiency.

Your Body Can Absorb Vitamins Directly From Air, Evidence Shows