Very nicely sealed and inside the packaging that is shown in the photo, it was in plastic bags to prevent moisture from entering.

I use it in combination with the same company's citric acid to create CO2 for the plants in the aquarium.
I am satisfied.

It helps a lot with digestion.
It corrects the body's pH. This is particularly important.
It is slightly antiseptic for fungi and other harmful organisms of the intestines, head, and body.
It helps the skin when diluted with lukewarm water, after bathing and showering (or even without prior use of soap, directly applied).
The quantity is determined by a doctor, especially when it comes to how much!