I think you need to find Icelandic moss (lat.Cetrária islándica) at the pharmacy. Its infusions are very good for the lungs and against tuberculosis. Just do not brew it with water above 60C.
!invest_vote
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Thanks for the info I will check it out
Opera theater singers use this tool. I was treated for covid with his help.
Interesting
I was busy today will look into it this evening