White tea is the most subtle of all the varieties of tea, using only the finest tea leaves from each bush with a minimal amount of processing. Considered by most connoisseurs to be the apotheosis of tea, white tea has yet to make a significant impact on Western culture. This will soon change, with new studies showing that white tea is 10% more effective in improving immune health than its green cousin. Adagio Teas continues to sell the finest loose white tea you'll find, and now offers one variety in a convenient gourmet tea bag as well.