An acid neutraliser is an essential substance that helps to counterbalance the acidic effects caused by various elements in our environment. There are many synonyms that can be used to describe an acid neutraliser, such as an alkaline solution, base, antacid, buffer, neutralising agent, or pH stabiliser. These terms are often used interchangeably in various contexts, including medicine, chemistry, and environmental science. An alkaline solution contains compounds that can absorb excess hydrogen ions in acidic substances, thereby neutralising them. A base is a substance that reacts with an acid to form a salt and water, resulting in a neutralised solution. Antacids are used to provide relief for heartburn and acid reflux by neutralising excess stomach acid. Neutralising agents and pH stabilisers are used to adjust the acidity or alkalinity levels of substances to a desired level in various industrial processes.