research into these different antacids:
1) gaviscon double action mint tablet (aluminium hydroxide and magnesium carbonate)
2) Rennie spearmint tablet (calcium carbonate and magnesium carbonate)
3) Milk of magnesia (magnesium hydroxide)
4) Tums (Calcium carbonate)
You must clearly explain why each antacid is good in the role of relieving acidity in the stomach and in general serving a useful purpose to the human body.
Must include scientific evidences from references from different types of media (books etc) with about 25 references in total.