1. Look at the label: Spirulina has four grades: feed grade, food grade, health care grade and pharmaceutical grade. The health food of regular manufacturers should have the blue health food logo in the shape of "Wei Shi Jian Zi (XX)No. XX" and "Police Tactical Unit" of the Ministry of Health of China, and the regular spirulina packaging should also have "ingredient content table" and "GMP" production logo.
2, look at the color: the processing process of spirulina is very important, and poor processing will lead to a large loss of nutrients. Standing in warm water for 6 hours, the soup is bright and sky blue; The inferior spirulina will be green, which proves that a large number of nutrients are oxidized and the nutritional value is low; If the soup is turbid, it proves that there are many starch additives and few nutrients, which is extremely unstable.
3.PH test: The advantages and disadvantages of spirulina can be identified by PH acid-base test. Good spirulina should be weakly alkaline after being dissolved in water. Alkaline food has been proved by nutritionists all over the world to be beneficial to human body. Poor spirulina will be weakly acidic, which will not only fail to meet the nutritional standards, but also have side effects on human body.
4, tabletting test: judging the advantages and disadvantages by tabletting technology, the tabletting technology of high-quality spirulina is mature, the appearance is smooth, the hands are not touched, and it is not easy to break; Inferior spirulina has a rough appearance, which is easy to be soiled and broken in hands.