Mineral water does not directly burn fat and is not a weight-loss drink by itself. However, it can help indirectly by replacing sugary beverages and reducing overall calorie intake. If it improves post-meal comfort, it may support better eating control for some people. Still, weight loss is driven by energy balance, diet quality, and physical activity. High-sodium mineral water can cause temporary scale increases due to fluid retention—this is not fat gain. Its best role in weight goals is being a zero-calorie, plain beverage option with an appropriate sodium profile.