Why is covering the cup during lemongrass infusion recommended for maximum impact?

Answer

To prevent volatile aromatic compounds from escaping

When preparing a simple infusion of lemongrass tea, it is a simple technique worth remembering to cover the cup while steeping. This practice is employed specifically to retain the volatile aromatic compounds, such as citral and other essential oil components, which are carried away with the steam when the cup is left uncovered. By trapping the steam, these beneficial, oil-soluble components remain within the beverage, ensuring the body receives the maximum concentration intended for the infusion.

Why is covering the cup during lemongrass infusion recommended for maximum impact?
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