Yunker

Yunker Kotei Eki, Yunkeru Kotei Eki, (Japanese: ユンケル　黄帝液), is a health tonic produced by the Sato Pharmaceutical Corporation in Japan. It was first produced in 1967, and is widely available at drug stores throughout Japan. Yunker contains Chinese herbal ingredients and caffeine and is marketed to the Japanese workforce to combat fatigue.

It is one of 33 tonics manufactured by Sato for a range of ailments related to fatigue. The Yunker line of tonics is also sold in the USA and Europe, but the contents of some tonics have been altered to meet domestic regulations.

A USDA report from 2002 reported that exports of Yunkeru Kotei-eki to six countries including the United States and Germany were continuing to grow, and that Sato planned to start exports to Thailand later that year.

Ingredients
Yunker Kotei contains the following ingredients (quantities are quoted per 30ml daily dose):
 * sugars: 7g
 * vitamin E: 10 IU
 * Thiamin: 4.2mg
 * Riboflavin: 3.8mg
 * Vitamin B6: 5.0mg
 * Vitamin B12: 2.0μg
 * Niacin: 10mg
 * Sodium: 30mg
 * Royal Jelly: 100mg
 * Barrenwort Fluid Extract (Leaf) 100mg
 * Cnidium Fluid Extract (Fruit) 100mg
 * Asian Ginseng Extract (Root) 10mg
 * Hawthorn Berry Extract (Fruit) 3mg
 * Viper Tincture 100mg
 * Civet Tincture 100mg