To keep your lemon loaf cake fresh and flavorful, allow it to cool completely and then wrap it in plastic wrap or aluminum foil, or store it in an airtight container. This way, it can be kept at room temperature for up to 3 days, or refrigerated for up to a week, ensuring that each slice remains moist and zesty. If you've already glazed the cake, refrigeration is recommended to maintain the glaze's texture.