name "ginseng" is used to refer to both American (Panax quinquefolius) and Asian or Korean ginseng (P. ginseng), which belong to the species Panax and have a similar chemical makeup. Siberian ginseng or Eleuthero (Eleutherococcus senticosus) is another type of plant. Asian ginseng has a light tan, gnarled root that often looks like a human body with stringy shoots for arms and legs. In ancient times, herbalists thought that because of the way ginseng looks it could treat many different kinds of syndromes, from fatigue and stress to asthma and cancer. In traditional Chinese medicine, ginseng was often combined with other herbs and used often to bring longevity, strength, and mental alacrity to its users. Asian ginseng is believed to enhance the immune system in preventing and treating infection and disease. Several clinical studies report that Asian ginseng can improve immune function. Studies have found that ginseng seems to increase the number of immune cells in the blood, and improve the immune system's response to a flu vaccine. In one study, 227 participants received either ginseng or placebo for 12 weeks, with a flu shot administered after 4 weeks. The number of colds and flu were two-thirds lower in the group that took ginseng. Ginseng contains stimulants, but may produce side effect including high blood pressure, low blood pressure, and mastalgia. Ginseng may also lead to induction of mania in depressed patients who mix it with antidepressants. One of the most common and characteristic symptoms of acute overdose of ginseng from the genus Panax is bleeding. Symptoms of mild overdose with Panax ginseng may include dry mouth and lips, excitation, fidgeting, irritability, tremor, palpitations, blurred vision, headache, insomnia, increased body temperature, increased blood pressure, edema, decreased appetite, increased sexual desire, dizziness, itching, eczema, early morning diarrhea, bleeding, and fatigue. Symptoms of gross overdose with Panax ginseng may include nausea, vomiting, irritability, restlessness, urinary and bowel incontinence, fever, increased blood pressure, increased respiration, decreased sensitivity and reaction to light, decreased heart rate, cyanotic facial complexion, red face, seizures, convulsions, and delirium. The constituents of ginseng include triterpene saponins, aglycone protopanaxadiol, aglycone protopanaxytriol, aglycone oleanolic acid and water-soluble polysaccharides. Goji berry Marketing literature for goji berry (wolfberry) products including several "goji juices" suggest that wolfberry polysaccharides have extensive biological effects and health benefits, although none of these claims have been supported by peer-reviewed research. A May 2008 clinical study published by the