Nature's Sunshine Tei-Fu Essential Oil, .17 fl. Oz., 2 Pack | Pure Essential Oil Blend to Alleviate Minor Aches and Pains, Open Sinuses, and Relieve HeadachesTei Fu oils can be used for a wide variety of applications, especially where the refreshing, invigorating properties of essential oils are desired. Avoid contact with eyes, nose and other sensitive areas. Tei Fu Essential Oils [Nervous] was developed and perfected by a Chinese herbalist several decades ago. He created it using an ancient formula that was passed down in his family for more than 1,000 years. His secret formula was not for sale a trait