Tibet belongs to the plateau area, where the air pressure and oxygen are relatively thin, the oxygen content in the air is insufficient, and the oxygen molecules inhaled by the human body are low, which will cause a series of hypoxia reactions.
Rhodiola is a kind of herb, which grows in harsh environment. Strong vitality, with the functions of benefiting qi and promoting blood circulation, dredging pulse and relieving asthma. So some people will take rhodiola to relieve altitude sickness before going to Tibet. Everyone's physical condition is different, and going to the plateau will not cause altitude sickness, so some people don't need to take it.
Extended data
Matters needing attention of rhodiola sachalinensis
1, rhodiola sachalinensis is cold, so it should not be used by pregnant women and those with deficient constitution.
2. The dosage of rhodiola sachalinensis is about 3- 10 at a time, so it is not suitable for excessive use.
3. People with fever and cough should use rhodiola with caution to avoid aggravating their illness.
Baidu Encyclopedia: Rhodiola (Chinese Medicine)