In all honesty I would never do this again with the quality of water these days, but I wanted to share a memory.
When I was young in Bulgaria me and my aunt would get a large plastic bottle of water when we went in the mountains and fill it with spring water. It was free and a lot of people did this, carrying two bottles somewhere around 5? liters on the bus back to the city. It was the same price as buying it, but it was much more fresh.
Anyway, the water in one of the large plastic bottles turned light green, which based on my chemistry knowledge at the time, was safe to drink, but had a citrusy taste.
The thing is that water in a river or one of the fountains where spring water flowed never expired, but when left in a plastic bottle (even in cold conditions this was before global warming) can expire.
Now. You may be skeptical, but in even more honesty I should admit something, when it came to chemistry later on in school I had the worst grade, but we never really got into the chemistry of food and water. Food chemistry I would have gotten the best grade in the class, if we had assignments on that.
Anyway, during my childhood I drank about 5 large sips straight from the bottle. Back then there was even an agency dedicated to the preservation and cleanness of Bulgarian Spring Water such as in high places, I don't know how it is now.
It was the strongest probiotic I have ever drank in my life. I felt incredibly healthy a few days later and this lasted for 2 years, and still has mild health benefits even now that I'm 32 years old. With the clean Bulgarian water I felt much better than I have ever felt in my life. I guess I could even call it a super probiotic, which I would compare to a superfood.
I didn't vomit back then or have any bad health effects, but it felt like it cleared my system of bad bacteria, because the additional good bacteria overpowered them. I wouldn't say fire if there's no fire. Everyone knows that light green water back then was expired but safe to drink, but no one knew it had probiotics in it. And that dark green water should immediately be thrown away.
If water quality improves in time, with the recommendation of a licensed physician I would recommend doing this once in your life. I'm not a scientist, nor am I a doctor, but from my personal experience this was really... Really healthy for me.
I don't know what bad bacteria I had in me but I felt better. Just saying.
Sometimes proof is the greatest form of respect and admiration, I wouldn't imprison someone for sharing a genuine memory, maybe if a physician or chemist studied it, you would see for yourselves that there are in fact probiotics in lightly expired water.
In addition to this I understand that it seems crazy, but you know expired fruit makes alcohol -it's safe to drink, expired leaves make tea -it's safe to drink.
The only thing I don't remember is if the plastic bottle was closed or I forgot to put the cap on before it expired, but there were probiotics in it.
Aside from all that I have a feeling based on memory, that I wrote this before, and was injected with something, which made the probiotics lose their effect, but I want to write something to change your minds if someone tries this again in Europe and goes back to live in the US.
I was never depressed, but there were times when I was upset, the probiotics in this water made me more cheerful and... it is possible that maybe even depression is simply caused by bad bacteria? After being injected, the water has lost most of its effect. I'm not upset, because a lot of time has passed since my father caused me problems, but I've adopted a more serious state of mind. I don't know if it's a good thing, but I was different before, especially during childhood after drinking it. I think I can summarize it by saying "Let's walk around and explore all of Bulgaria during summer." I told my aunt this two days after drinking it. I liked to walk everywhere for decades after, but the feeling of enjoying that has almost completely passed. This is, partly, why I had such strong legs during my life before losing my appetite from not having a significant other as an adult in Bulgaria.