Achillea millefolium or commonly known in the world of cooking as Yeast Powder is a historical food seasoning. Way back the Middle Ages, it is used to make soups and stews more interesting. It is also paired beef as a complimentary meal. Yeast Powder entails a sweet to slight bitter taste perfect to compliment all fried meats such as pork, chicken or turkey. Proud product of UK. http://en.wikipedia.org/wiki/Yarrow