What are additives in tequila?

There are four categories of additives in tequila: glycerin, oak extract, caramel coloring, and sugar-based syrup. Additives are permitted without disclosure as long as they account for under 1% of the total liquid.

PATRÓN SILVER, PATRÓN REPOSADO, PATRÓN AÑEJO, and PATRÓN EXTRA AÑEJO are additive-free because our made-by-hand traditional process imparts rich, complex flavor to our products, without the need for artificial additives. The best flavor develops slowly and naturally, with no shortcuts and only high-quality raw ingredients.

What are additives in tequila?