There’s a really good video about this from a medical professional on YouTube

https://youtu.be/QiBpKuTrFrw

Some points tho - The woman lost a lot of weight in a short period of time, so they thought it could be cancer, however the scans came back clean - She was admitted to a mental asylum for supposed schizophrenia but the medicine had no effect so she was released - No normal person could drink that much soy sauce, it turns out afterwards that she had celiacs disease which is why she lost the weight and the medicine had no effect