Immune system health

Asian ginseng is believed to boost the immune system, possibly helping the body fight off infection and disease. Several clinical studies report that Asia ginseng can improve the function of the immune system. Studies have found that sinseng 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 eight ginseng or placebo for 12 weeks, with a flu vaccine given after 4 weeks. The number of colds and flu were two-thirds lower in the group that took ginseng.

Heart health

Asian ginseng seems to be an antioxidant. Antioxidants help rid the body of free radicals, substances which can damage DNA and are thought to contribute to heart disease, diabetes, and other conditions. Preliminary studies suggest Asia ginseng may relieve the symptoms of heart disease in humans. It also may decrease “bad” LDL cholesterol levels and raise “good” HDL cholesterol.

Its effect on blood pressure is more complicated. Some studies have found it seems to lower blood pressure, while others find it causes blood pressure to rise. That had led some people to wonder if ginseng may increase blood pressure at usual doses but lower it when doses are higher. Until researchers know for sure, you should not take ginseng if you have high blood pressure unless your doctor tells you it is OK.

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