Inhaling helium can be dangerous and potentially fatal if done improperly. Helium is an inert gas that does not support normal respiration, so if you inhale a large amount of helium, it can displace the oxygen in your lungs and lead to oxygen deprivation (asphyxiation).
The exact amount of helium required to cause death can vary depending on several factors, including the individual's lung capacity, the concentration of helium inhaled, and the duration of exposure. It is difficult to provide an exact quantity, as it can be highly dangerous and life-threatening even in small amounts.
Inhaling helium directly from a high-pressure source, such as a helium tank or balloon, can be particularly hazardous. The rapid influx of helium can quickly displace oxygen, leading to unconsciousness and potentially death within minutes.
It is important to emphasize that inhaling helium for recreational purposes or to produce a high-pitched voice (known as "helium voice") is extremely risky and strongly discouraged. Helium inhalation should only be performed under controlled and supervised conditions by trained professionals, such as medical personnel administering it for specific therapeutic purposes.
If you or someone you know has inhaled helium and is experiencing symptoms such as dizziness, shortness of breath, or loss of consciousness, it is crucial to seek immediate medical attention.