We must realise from this that when drinking ZamZam water for a purpose and after making the intention then we must not say ‘ Lets TRY it as that defeats the purpose’ Rather we must believe that inshaAllah Allah swt will DEFINITELY cure us/ fulfill our intention inshaAllah.
Zamzam water is the best, most fresh, most beneficial, most beloved, purest and most precious water there is. ZamZam water was dug up by the angel jibril and was the sourse the prophet baby Ismail drank from.
In the Sahihain it is narrated that the prophet s.a.w. said to Abu Thar, who remained at the Kaabah for forty days without food (or drink) living on only ZamZam. Further more, Ibn Majjah narrated that Jabbir ibn Abdullah related from the prophet S.A.W. that he said ‘ZamZam water is for whatever was intended behind drinking it.