What does it mean that Patrón is additive-free?

Patrón is additive-free, which means that we do not add anything to our tequila that alters the taste, smell or color. No ingredients, such as glycerin, food coloring, synthetic agave, or oak extracts are added to enhance flavor or appearance. With that comes tequila in its highest and most purest form. Drinking Patrón ensures you know what’s in your glass.