Siberian ginseng is often called an "adaptogen." This is a non-medical term used to describe substances that can supposedly strengthen the body and increase general resistance to daily stress.

In addition to being used as an adaptogen, Siberian ginseng is used for conditions of the heart and blood vessels such as high blood pressure, low blood pressure, hardening of the arteries (atherosclerosis), and rheumatic heart disease.

It is also used for kidney disease, Alzheimer's disease, attention deficit-hyperactivity disorder (ADHD), chronic fatigue syndrome, diabetes, high cholesterol, improving loss of sensation in extremities (peripheral neuropathy), fibromyalgia, rheumatoid arthritis, reducing the effects of a hangover, flu, colds, chronic bronchitis, and tuberculosis. It is also used for treating the side effects of cancer chemotherapy.

Some people use Siberian ginseng to improve athletic performance and the ability to do work. They also use it to treat sleep problems (insomnia) and the symptoms of infections caused by herpes simplex type 2.
It is also used to boost the immune system, prevent colds, and increase appetite.

Increasing energy and reducing fatigue
As a stimulant, eleuthero boosts energy levels and contains compounds known to help overcome exhaustion and prevent its side effects.
One study found that eleuthero consumption significantly increased the exhaustion point of swimming mice by lessening the build up of lactic acid and blood urea nitrogen, in addition to increasing fat utilization.
Classed as a tonic herb and a mild stimulant, Siberian Ginseng has the ability to increase your work capacity after a single dose, increasing both immediate and long term energy.

Besides protecting the body from stress, Siberian Ginseng also increases oxygenation of the cells, thereby increasing endurance, alertness and even visual acuity. This increased oxygenation leads to better circulation – especially to the brain – helping to restore memory, concentration and mental clarity.
A favourite supplement for professional runners, Siberian Ginseng delivers a powerful energy boost. It is so popular that it’s hard to find any runners who do not take it before a race – simply because they cannot outrun the other competitors who do use it.

Reducing Anxiety and Depression
There are many studies of eleuthero, and many appear to support its numerous benefits. True to its adaptogen nature, research shows it can protect the body from various stresses as an antioxidant.

As for helping with emotional stress, anxiety, and depression, research is unclear. Many researchers believe that more studies are needed to know for sure what eleuthero does — and how.

One studyTrusted Source showed that the herb boosted energy, metabolism, and physical performance in the study participants. It also had positive effects on their cardiovascular health, improving blood flow and pressure.

A few other studies lend strong evidence to support eleuthero’s other claims. For example, results of one study show the herb may have great antioxidant potential. An animal study reported promising immune-boosting properties. Another study found that eleuthero may help regulate blood sugar.

As for its impacts on stress, anxiety, and depression, a 2013 study found taking the herb resulted in little improvement. However, the doses used in the study were smaller than commercial doses, so the results may reflect that difference. Another study showed nerve-protective properties that could improve stress levels and mood. However, the study was done on animals, so more research is needed for humans.

Improving cognitive function
By increasing circulation, eleuthero may increase blood flow to the brain, improving mental functions such as memory and concentration.

Improving exercise
As a stimulant, eleuthero may increase the ability of muscles to do work, especially during periods of intense physical activity.
One study found that consuming 800 milligrams (mg) of eleuthero a day for 8 weeks increased a male subject’s endurance time by 23 percent, peak oxygen saturation by 12 percent, and highest heart rate by 3 percent.