American ginseng is a yin-tonifying herb commonly used as a tonic in daily life. Native to Canada and the United States, it has recently been cultivated in China's Northeast region and provinces like Hebei, Jiangxi, and Hunan. "American ginseng" (花旗参) derives its name from the historical term "Flower Flag Country" used for the United States, originating from the northern U.S. to southern Canada.Although American ginseng and Canadian ginseng belong to the same species, climatic differences result in American ginseng having more pronounced horizontal striations on its surface and higher concentrations of active compounds. However, like any region, both produce authentic medicinal materials and inferior products, so discernment is key.
To distinguish genuine American ginseng, first examine its shape. American ginseng is conical, spindle-shaped, or cylindrical, measuring 3–12 cm in length and 0.8–2 cm in diameter. The crown is typically removed or partially retained. Its surface appears light yellowish-brown or yellowish-white, displaying transverse rings and linear lenticels, along with fine, shallow longitudinal wrinkles.Its cross-section is flat, pale yellowish-white, and slightly powdery. The cortex shows yellowish-brown dot-like resin canals forming brownish-yellow layered rings, while the xylem exhibits radial patterns.
American ginseng is firm and difficult to break. When held and smelled, it possesses a distinctive aroma. Tasting the sliced pieces reveals a slightly bitter, mildly sweet flavor with a lingering sweetness.When purchasing, it's best to first smell the aroma and then taste the sliced pieces. If there is no distinct scent, or if the taste is bland with slight bitterness or sourness and astringency, it should be viewed with suspicion. Counterfeiting with Chinese Ginseng is most common Counterfeiting American ginseng with Chinese ginseng is widespread in the market.Many restaurants and eateries sell ginseng soups, often using domestically produced sun-dried ginseng or wild soaked ginseng sliced as American ginseng.
Visually, Chinese ginseng lacks the distinctive fragrance of American ginseng. Its surface is rough, yellowish-white in color, with coarse, prominent longitudinal wrinkles and horizontal lenticels. It feels lighter and spongier, has a flat cross-section, less distinct radial patterns, and visible fissures.
Additionally, wild mountain ginseng features numerous horizontal ring patterns known as "iron wire lines," a distinct difference from American ginseng.
Other common counterfeits include sand ginseng and angelica dahurica. Sand ginseng is conical or spindle-shaped, relatively light, and spongy in texture, breaking easily. Its cross-section is uneven with many fissures and has a slightly sweet taste.Angelica dahurica features pitted, raised lenticels on its surface, with leaf sheath and stem scars at the top. It is brittle and light, with a white, radiating cross-section showing a wide phloem and narrow xylem. It emits a distinctive aromatic scent, tastes pungent and slightly bitter, and lacks the lingering sweetness of American ginseng.
Prevent adverse reactions by taking appropriately
During American ginseng use, avoid radish, tea, coffee, and concurrent use with Euphorbia. Prolonged excessive intake is inadvisable. Some individuals should not consume American ginseng. Those with deficient yang qi or cold-dampness in the stomach should refrain.Avoid ginseng if you experience: pale complexion, facial and limb swelling, aversion to cold, poor appetite, nausea/vomiting, abdominal distension, thick white tongue coating; or if you are male with impotence, premature ejaculation, or nocturnal emissions; or female with low libido, painful menstruation, amenorrhea, or excessive watery vaginal discharge. Additionally, children with developmental delays, poor digestion, or colds/coughs should not take ginseng.