Polyterpenoids are a class of complex natural products derived from terpene units, which are five-carbon building blocks found in many plants and fungi. These molecules exhibit diverse structural arrangements and possess a wide range of biological activities. Commonly found in essential oils, polyterpenoids can serve various functions such as antioxidants, anti-inflammatory agents, and antimicrobial compounds. Their complexity often involves multiple levels of chemical modifications, including oxidation, reduction, and ring formation. Due to their unique properties, polyterpenoids have attracted significant interest in pharmaceuticals, cosmetics, and food industries for their potential health benefits and use in natural products.