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If we breath through the nose (inhaling and exhaling)- we have to drink the only small fraction of this amount. In this instance we safely absorb water from the air as much, as our body needs, (air contains up to 1% of water). It is the most natural and safe source of water.
If it is a problem to breath through the nose (inhalation and exhalation), we. have the good idea naturally and safely rehabilitate it with sea (natural) salt solution (U.B.B. developed methods).
On the photo: The one of the most important U.B.B. exercise .