Method 2: Method 2: Drop a drop of propolis content on white paper (writing paper and facial paper), leave it for a few minutes, and observe its changes:
Low content is not easy to seep open, the glue content is higher; Large diffusion and serrated circumference indicate low glue content;
● The color is yellow and slightly green, and there is no impurity, indicating good quality; Dark brown is black, and the feel of particles is coarse, which indicates that there are more impurities;
Low quality propolis is golden yellow paste after drying, with luster;
High-quality propolis has a special fragrance and a refreshing feeling of being in the new green.
Photo reference: Jiajia Tesco. com
Method 3: Put the propolis product into a third cup of cold boiled water, observe its solubility and whether it contains impurities, see the concentration, color and purity of the aqueous solution, and taste its taste.
Water solubility and impurities: high-quality propolis products should be completely dissolved in water without any impurities; However, propolis tablets and hard capsules are difficult to be dissolved in water, and some of them can't be dissolved in water for a month; Most of the soft capsules are not completely dissolved in water and become paste; There will be many substances stuck to the cup wall in inferior propolis solution. This is because propolis solution contains a lot of beeswax that may be harmful to human body;
Concentration, color and purity: Good propolis should be golden yellow in water, which is the true color of precious flavonoids. The higher the concentration, the higher the content of propolis. But while paying attention to the concentration, it is also necessary to observe the purity of the aqueous solution. Some propolis is made by adding substances such as emulsifier, and the aqueous solution looks high in concentration and golden in color, but its purity is not high, it has a turbid feeling, and often there is precipitation at the bottom of the cup. Leave it for a day or two, and if the aqueous solution turns orange, it indicates that the manufacturer has added emulsifier and other substances to the propolis solution;
Taste: If no obvious problems of propolis products are found through the above observation, the last step is to taste the aqueous solution. The real propolis has a light bitter taste, but it will have a spicy feeling in the throat when swallowed. The stronger the pungency, the higher the quality of propolis. This is the most critical step in the quality identification of propolis. Almost all seemingly good quality propolis products will show their true colors in this process. The defects of most propolis products can be found through the above steps. When buying propolis products in the future, you can ask the merchants to put their products in water to judge their quality.