First, the difference between true and false: fake oil is definitely cheap. There are generally several kinds of fake oils, such as Shandong oil, oviductus ranae, frog oil, prairie frog oil and Mingtai fish oil. Generally, it can be distinguished well, but it can be seen by adding water that its foam is generally only 5- 10 times.
Second, the distinction between pure producing areas and quasi-producing areas: Not all frogs in Northeast China belong to China Rana chensinensis, only China Rana chensinensis in Changbai Mountain area of Jilin Province is China Rana chensinensis, which is a geographical indication species. The purity of Rana chensinensis oil (Rana chensinensis from China) produced in other northeastern provinces is quite different from that produced in Changbai Mountain, mainly in the color and foaming ratio after being mixed with water, and of course the curative effect is also different.
Third, the difference in humidity: the same is pure frog oil, and the humidity is different with different prices. The price of 20% humidity and 5% humidity is definitely different. Everyone must understand that the price of water in hand and dry water is definitely different.