I’m not sure how you guys define “hoaxes” here. If something is a real product that’s actually for sale, but that’s based on the placebo effect, is it a hoax?
Anyway, this is basically homeopathy:
If you don’t want to follow the links here’s some quoted text:
Proponents call homeopathy’s defining principle the “Law of Similars.” (“Like cures like.”) This holds that substances that cause healthy people to get symptoms can cure diseases that have these symptoms.
If the allegedly medicinal substance is soluble, 1 part is diluted in either 9 or 99 parts of distilled water and/or alcohol and “succussed” (shaken) vigorously; if insoluble, it is finely ground and “triturated” (pulverized) in similar proportions with powdered lactose (milk sugar). One part of the diluted medicine is diluted, and the process is repeated to reach the desired concentration, after which it may be bottled or used to impregnate sugar granules.
Advocates claim that the lower the concentration of a substance, the more potent it becomes. This concept, often referred to as the “Law of Infinitestimals,” is the equivalent of saying that the less sugar you put into a cup of coffee, the sweeter it will become. This is just the opposite of the dose-response relationship that pharmacologists have demonstrated.