The iron stick yam powder recommended by Yangshengtang is true. It is a convenient food made of iron stick yam rich in DHEA as the main raw material. It not only retains most of the nutrition in iron stick yam, but also is convenient to eat and carry, and can supplement nutrition for human body. The column "Yangshengtang" is a health program launched by the Science and Education Channel in 2009. Its content is true and reliable, and it is worth a try.