It was proven to be bunk in 1835
You know what would be a great test of homeopathy? What if you took a bunch of glass jars labelled 1-100, mixed ’em up, then filled half of them with distilled snow-water and the other half with the same water but treated to “C30” strength (super-duper powerful) by the town’s leading homeopathy proponent? Then you could get a group of volunteers to drink one and report a few weeks later if they felt anything. By matching the reports with a list of which jar had what, you could see if the treated water had actually cured anything!
This idea is so great, public health official Friedrich Wilhelm von Hoven performed it almost 200 years ago to discover that no, homeopathic treatments are baloney. This is called the Nuremberg salt test of 1835 and I’m sure von Hoven would be incredibly irked to find that his definitive, modern-criteria-meeting study didn’t kill homeopathy dead right out of the gates.
Different “cures” are indistinguishable from each other
Even homeopaths have no way to distinguish end products from each other. Given a random vial of homeopathic cure or water, they can’t tell the difference because there is no difference. This was the basis of at least one skeptic’s million-dollar challenge, which went unclaimed.
If you wanted to distinguish real medicine, checking eBay, for less than 20$ (sometimes less than 3$) you can buy reagent test kits for: pH, keytones (in urine this is an indicator of uncontrolled diabetes), various opioids (I expect for US police use?), various liver excretion in urine, glucose, etc. etc. Heck – if you wanted to be really simple, by boiling some red cabbage you get yourself an effective pH indicator. (It’s fun – try it at home).