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Effects of conventional hot air dehydration and lyophilization on the total phenolic content and antioxidant potential of broccoli stalk powders
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Introduction: The valorization of agro-industrial byproducts plays a key role in promoting sustainability and supporting the development of functional foods (Food and Agriculture Organization of the United Nations, 2019; Ramírez- Pulido et al., 2021). Broccoli stalks, often industrially discarded, are a rich source of bioactive substances, particularly phenolics, with potential health- promoting effects (Yan et al., 2023). Efficient drying methods can transform these byproducts into high-value ingredients, while preserving their bioactive potential (Ramírez-Pulido et al., 2021). Objectives: Evaluate the impact of two drying methods (conventional hot air dehydration and lyophilization) on the total phenolic content and antioxidant activity of broccoli stalk powders. Conclusions: This work reinforces the potential of broccoli stalks as sources of bioactive substances, especially phenolic compounds. Both drying methods enabled the preservation of bioactive content, fostering the development of functional ingredients and supporting circular economy practices through food waste reduction and sustainable byproduct utilization.