The market for canned and bottled oxygen in Japan is picking up amid increased inquiries from stressed-out office workers.
Oxygen products sell well at convenience stores, but because they are treated as nonmedical items, manufacturers aren't allowed to provide information on their effectiveness.
In fact, some people may inadvertently worsen existing medical conditions or develop new illnesses, depending on how the oxygen is administered and what's mixed in it, according to the U.S. Food and Drug Administration.