Hi samguitar,
Bamboo is just one of many viscose/rayon type of fabrics that are all made from some type of cellulosic source material (such as from bamboo, beech trees, pine trees, eucalyptus and many others) and by the time they are dissolved in a solvent and then made into a fabric they wouldn’t really have many of the benefits of the original source of cellulose any longer. There is more in post #2 here and the links inside it.
Phoenix