Tom is absolutely correct as far as my experience goes. As far as I can tell, if I had syringoma problem, I would crush either very green tomatoes, or the potato berries, I would mix it with dolomite powder and I would apply it topically, making absolutely sure that it does not get into the eyes. Definitely not for internal use.
Look up syringoma and solanin on Wikipedia.
In my experience, I have grown a beard since my twenties, which is the most natural way to prevent this condition. Shaving whatever bodily part is only filling razor and chemical manufacturers and distributor's pockets, useless as it is.
But. Use of aftershave containing ethyl alcohol, rather than isopryl, does wonders, especially if you top it off with polysporine.
When you go back in history, alum
Has been used for the purpose of absolutely positively disinfecting skin after shaving without any side effects. Cheap as it is being quarried, and simple as it is to use just lightly rubbing the stone on the freshly shaved skin and long lasting [pretty much average human lifetime] it has been advertised out of use by cosmetic industry and replaced by first ethyl alcohol based odorized solutions called aftershave, now replaced by isopryl alcohol [quite poisonous as opposed to ethyl alcohol] based odorants.
Its best advantage over any alcohol based lotions was, that the film of the alum on the skin would not evaporate and protected the skin from infection for as long as one did not wash, or sweated it off. Alum also accelerates healing of cuts and abrasions probably by 75%. No kidding.
Thinking of it, I wonder what it would do used internally. I guess I have another item to research.
I worked near a natural alum lake in Chomutov, Czech republic as a construction worker and swimming in that water showed me what it does to minor injuries. The 75% minor injury healing acceleration is not an exageration.
No, I have no clue where to get it. Do your own homework, I will do mine.
With kind regards, Slavek.