As I say, I was quite surprised as were some friends and...

As I say, I was quite surprised as were some friends and relative by how well homeopathy worked...
Now there may not be anything much more than a placebo effect at work, but for the people that it helped, they dont care...

It is interesesting enough to look at further as several Nobel Prize winning scientists have decided...

So as for your "even if they are present at such extremely low levels, how then do they do anything to the people that take these potions?" question...

Not that I am any sort of expert, but I do know enough about google to do a 1 second search and I have read the article I posted along with a few more over a few months...

If you had read the last sentence of so of that posted fragment of the article I referenced you would have seen the word "hormesis"...

then https://en.wikipedia.org/wiki/Hormesis

and voila...

Hormesis (from Greek hórmēsis "rapid motion, eagerness," from ancient Greek hormáein "to set in motion, impel, urge on") is the term for generally favorable biological responses to low exposures to toxins and other stressors. A pollutant or toxin showing hormesis thus has the opposite effect in small doses as in large doses. A related concept is Mithridatism, which refers to the willful exposure to toxins in an attempt to develop immunity against them. Hormetics is the term proposed for the study and science of hormesis.
In toxicology, hormesis is a dose response phenomenon characterized by a low dose stimulation, high dose inhibition, resulting in either a J-shaped or an inverted U-shaped dose response. Such environmental factors that would seem to produce positive responses have also been termed "eustress."
The hormesis model of dose response is vigorously debated.[1] The notion that hormesis is important for chemical risks regulations is not widely accepted.[2]
The biochemical mechanisms by which hormesis works are not well understood. It is conjectured that low doses of toxins or other stressors might activate the repair mechanisms of the body. The repair process fixes not only the damage caused by the toxin, but also other low-level damage that might have accumulated before without triggering the repair mechanism."