Goji Berry Benefits: Research and Scientific Studies

According to a study published in International Immunopharmacology in 2004, goji berries improve the immune system and even reduce the growth of cancerous cells. Because the berries are so high in phytochemical antioxidants, they support a healthy immune system by promoting the growth of beneficial bacteria within the body. Goji berry is also high in vitamin C and zinc, both of which are necessary for strong immunity.

Goji berries contain high concentrations of zeaxanthin and beta-carotene, which are cartenoids that may help protect the retinas and prevent the development of age-related macular degeneration. Although specific scientific evidence is lacking, an article published in Ophthalmic and Physiological Optics in 2004 states that the ideal ocular nutritional supplement should be high in vitamins C, lutein and zeaxanthin, all of which are found in abundance in goji berry.

A study published in Biological & Pharmaceutical Bulletin found that purified goji berry polysaccharides and goji berry extract containing zeaxanthin may protect against liver damage in animals. Although promising, human trials are still required to confirm the findings. Other scientifically proven benefits of goji berries include their ability to lower blood sugar levels, reduce the growth of cancer cells and prevent fatigue during exercise.

How to Take Goji Berries

Goji berries are taken in a variety of ways, although the most common is to make a tea from the dried berries. To make, boil five to 15 grams of dried goji berries in four to eight ounces of boiling water for approximately 15 minutes, strain, sweeten if desired and drink immediately. Prepared goji juice can be purchased from natural health stores and should be consumed according to the manufacturer's directions for the best results.

In some cases, individuals may wish to consume the whole, raw berries, when available. The recommended dosage is up to 15 grams per day. A study published in 2005 in the British Journal of Nutrition found that patients who consumed 15 grams of raw goji berries per day experienced a rise in zeaxanthin levels in the blood.

Goji Berry Side Effects

Numerous goji berry benefits exist, many of which science has only begun to uncover. As an overall health tonic, the berries are generally safe for human consumption and in the decades they've been used, no reports of serious side effects from prolonged or short-term use have been made. There are also no known drug interactions, although its always best to consult a qualified medical practitioner before taking any new supplement with prescription drugs.