期刊
PLANT FOODS FOR HUMAN NUTRITION
卷 -, 期 -, 页码 -出版社
SPRINGER
DOI: 10.1007/s11130-023-01048-8
关键词
Microgreens; Tea; Herbs; Antioxidant; Rosmarinic acid; Infusion
Lemon balm is commonly consumed as herbal tea, and this study investigated the use of both adult and microgreen lemon balm for tea preparation. Adult lemon balm tea had higher levels of phenolic compounds and antioxidant capacity, while microgreen tea had higher mineral content. The mineral content was not significantly affected by the brewing conditions. This study supports using dried microgreens for herbal tea.
Lemon balm (Melissa officinalis L.) is commonly consumed as an herbal tea for its antioxidant health benefits. Young seedlings known as microgreens are popular for their distinct flavors and can contain higher mineral content on a dry weight basis compared to their adult counterparts. However, the use of microgreens for herbal teas has not been previously investigated. In this study, lemon balm was grown to adult and microgreen harvest stages and prepared as herbal teas by brewing with boiled (100 degrees C) water for 5 minutes and room temperature water (22 degrees C) for 2 hours. The effects of harvest time and brewing method on the mineral content, phenolic compounds, and antioxidant capacity of lemon balm herbal teas were assessed. Results showed that adult lemon balm tea contained higher total phenolics, total flavonoids, rosmarinic acid, and antioxidant capacity than microgreen teas, with hot preparations containing the highest amounts (p <= 0.05). In contrast, microgreen lemon balm teas contained higher amounts of minerals (p <= 0.05), including calcium, potassium, magnesium, sodium, phosphorus, copper, and zinc. In general, brewing conditions did not impact the content of most minerals. Overall, the results support the potential of using dried microgreens as herbal teas. Microgreen lemon balm teas prepared hot and cold offer antioxidant compounds and are richer sources of minerals than adult teas. The ease of growth for microgreens offers consumers the opportunity for home preparation of a novel herbal tea beverage.
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