Lycium berry is the traditional rare medicine material in China . In accordance with the Chinese Pharmacopoeia , the dried berries of lycium grown in Ningxia ( or Lycium Barbarum L. ) are authentic among its kind . Though lycium is grown in many other provinces or regions in China , the ready products of lycium grown in Ningxia is considered the best which accounts for 80% of the total sales volume nationwide . The dried ripe lycium berries are effective in nourishing liver and kidney, restoring vital energy and improving visual acuity . “ Regular use of lycium berries strengthens the bone , tendon and muscle , maintains youth and makes one cold and hot-resistant . … it nourishes vitality and others , improves one’s looks and visual acuity and results in longevity ” . For hundreds of years , lycium has been frequently employed for life-prolonging and frequently found in imperial esoteric recipes . Over the years passed , more and more pharmacological researches concerning lycium berries and Polysaccharide of lycium barbarum have been made ,which provides a concrete theoretical grounds for clinical practice and that proves a promising market for the product . The intensive processing of lycium , however , is still a rarity today with more common sales of raw material which is not only low in production value but also inconvenient to take , to store and leads to a shorter period of quality maintaining . Large amount of berries loss their value as commodities just because of moth-eating and going moldy . To change the situation , research on the intensive processing and development of lycium products are the best solution .