1. Antacid: Magnesium hydroxide is a common ingredient in antacids, where it acts as a neutralizer for stomach acid. It works by converting stomach acid into water and magnesium chloride, which helps to reduce the feeling of heartburn and indigestion.

2. Cathartic: Magnesium hydroxide also acts as a saline laxative when taken in larger doses. It draws water into the colon, stimulating bowel movements and relieving constipation. This property makes magnesium hydroxide a common ingredient in over-the-counter laxative preparations.

3. Magnesium Supplementation: Magnesium hydroxide can be used as a source of magnesium, a mineral involved in multiple body functions such as muscle and nerve function, bone health, energy production, and protein synthesis. In cases of magnesium deficiency, which can occur due to inadequate dietary intake or specific medical conditions, magnesium hydroxide supplements may be taken under medical supervision.

4. Deodorant: Some deodorant products may contain magnesium hydroxide as an odor absorber.

5. Industrial Applications: Magnesium hydroxide finds uses in various industrial processes and manufacturing, including as an additive in ceramics, fertilizers, rubber, plastics, paints, and papermaking.

These are the some notable uses of magnesium hydroxide. Some formulations or applications may require the use of different grades or modifications of magnesium hydroxide based on specific requirements. As with any medicinal or industrial use, consulting a healthcare professional or subject matter expert is advisable to ensure proper usage and handling