It has been found to protect the body against the effects of uv radiation , and this application is being studied extensively by food and drug administration in washington , dc . dietary beta - carotene also has been found to be effective against carcinogenic pollutants . a 1983 study showed that beta - carotene protected guinea pigs from the free radical damage caused by an injection of carbon tetrachloride 日本绿藻自1950年由dr . fujimaki发现后,再经许多日本医学者的研究,证实绿藻是极佳的天然碱性食品,长期服食日本绿藻可将酸性体质调节为健康的弱碱性体质,使身体更健康。