1 doctor weighed in:

Will breathing in helium gas for an extended period of time (a couple of hours) cause any adverse effects on someone?

1 doctor weighed in
Dr. Philip Miller
Family Medicine

In brief: Yes

We actually need oxygen for normal heart and brain function.
Extended inhalation for "fun" sake can be very dangerous.

In brief: Yes

We actually need oxygen for normal heart and brain function.
Extended inhalation for "fun" sake can be very dangerous.
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