@alicargofer, nice post! We would want to be careful not to imply that simply good nutrition will take care of a lot of issues like all parasites, but good nutrition will certainly reduce susceptibility, and the nutritional ingredients you list above are efficacious in maintaining good digestive health, boosting immunity directly, which does include activity against some bacteria, toxins, microbes, etc. You also refer to many areas of ethnobotany, where cultures have developed native cures using natural products.