It is good to make soup or stir-fry with other foods, but pay attention to less oil.
There should be no harm to the body. It can help detoxify, but you should also pay attention to nutrition when losing weight. It is estimated that eating konjac for a long time is not acceptable. Health comes first.
I am not from Guizhou. I suggest you go to the supermarket. It seems that supermarkets should have konjac fans or something.
Or search on Taobao, there should be sellers to buy konjac powder.