Identify which is efflorescent, deliquscent, hygroscopic substance: conc. sulphuric acid, magnesium chloride, glauber's salt, caustic soda.​

Solubility would be your answer.

Any vitamins or supplements can be obtained without prescription and are widely used as alternative from western medications. most supplements are not valued by the fda or any other drug and food agencies.

Ibelieve its because the stove is a cleaner burning fuel