木耳有好几个分类，功效都差不多：黑木耳，东北小木耳，云耳。云耳可以说就是木耳，只不过一般来讲云耳是高海拔产品，而木耳则是所有长于木头上耳朵状真菌体的通称。
云耳是木耳当中的一个种类，这三种木耳都有益气、润肺、补脑、轻身、凉血、止血、涩肠、活血、强志、养容等功效;含有大量的碳水化合物、蛋白质、铁、钙、磷、胡萝卜素、维生素等营养物质。云耳含有丰富的植物胶原成分，它具有较强的吸附作用，对无意食下的难以消化的头发、谷壳、木渣、沙子、金属屑等异物也具有溶解与氧化作用。
黑木耳的功效和作用
1、木耳的养血美容功效：木耳中铁的含量极为丰富，故常吃木耳能养血驻颜，令人肌肤红润，容光焕发，并可防治缺铁性贫血。
2、木耳的防血栓功效：木耳含有维生素K，能减少血液凝块，预防血栓症的发生，有防治动脉粥样硬化和冠心病的作用。
3、木耳的排毒功效：木耳中的胶质可把残留在人体消化系统内的灰尘、杂质吸附集中起来排出体外，从而起到清胃涤肠的作用，它还有帮助消化纤维类物质功能，对无意中吃下的难以消化的头发、谷壳、木渣、沙子、金属屑等异物有溶解与氧化作用，因此，它是矿山、化工和纺织工人不可缺少的保健食品。
4、木耳的化结石作用：它对胆结石、肾结石等内源性异物也有比较显著的化解功能。
5、木耳的抗癌作用：木耳含有抗肿瘤活性物质，能增强机体免疫力，经常食用可防癌抗癌。
There are several classifications of fungus, with similar effects: black fungus, northeastern small fungus, cloud ear fungus. Cloud ear can be said to be fungus, but generally speaking, cloud ear is a high-altitude product, and fungus is a general term for all ear-like fungi that are longer than wood.
Cloud ears are one type of fungus. These three types of fungus are beneficial to qi, moisturize the lungs, nourish the brain, lighten the body, cool blood, stop bleeding, astringe the intestines, promote blood circulation, strengthen vitality, and nourish body; they contain a lot of carbohydrates, Protein, iron, calcium, phosphorus, carotene, vitamins and other nutrients. Cloud ear is rich in plant collagen. It has a strong adsorption effect. It can also dissolve and oxidize the indigestible hair, husk, wood residue, sand, metal shavings and other foreign materials that are unintentionally eaten.
The efficacy and role of black fungus
1. The effect of nourishing blood and beauty of fungus: the iron content of fungus is extremely rich, so eating fungus can nourish blood and keep the face, make the skin ruddy and radiant, and can prevent iron deficiency anemia.
2. The anti-thrombotic effect of fungus: fungus contains vitamin K, which can reduce blood clots, prevent thrombosis, and prevent atherosclerosis and coronary heart disease.
3. The detoxification effect of fungus: the gum in fungus can absorb dust and impurities remaining in the human digestive system and excrete it from the body, thereby clearing the stomach and purging the intestines. It also has the function of helping digest fiber materials. It dissolves and oxidizes the indigestible hair, chaff, wood residue, sand, metal shavings and other foreign materials that are inadvertently eaten. Therefore, it is an indispensable health food for mining, chemical and textile workers.
4. The role of fungus in fossil calculus: It also has a significant function of resolving endogenous foreign bodies such as gallstones and kidney stones.
5. Anti-cancer effect of fungus: fungus contains anti-tumor active substances, which can enhance the body's immunity. Regular consumption can prevent cancer and fight cancer.
