1. The real oil is irregular and blocky, bent and overlapped. Large ones can reach a length of about 3 cm. The texture is not very hard, and it is easily broken (China Rana chensinensis with a little moisture will not break).

2. Fake oil is compressed from fish oil, which is relatively broken and shapeless.

Second, the color is different.

1, the surface of real oil is yellow or light brown, with fatty luster, occasionally with thin gray dry skin, which is very greasy to the touch.

2. The surface color of fake oil is dark and dull.

Third, the volume changes are different after soaking in water.

1, soaked in real oil in cold water, the volume can be expanded by about 40-60 times, showing cotton wool and cloud shape, with good elasticity and long-term soaking.

2. Some fake oils do not expand or expand in small volume, some are confused with water, and most of them are soluble in water.

Extended data

In addition to toad fallopian tubes, fake oil also uses fish testicles as frog oil. This fake has a purulent fishy smell, which will not swell after soaking in water, so it is easy to identify. In addition, plastic and wax blocks are added to frog oil, so you should check it carefully before buying it.

China wood frog is a famous economic frog species in China, which integrates medicine, nourishing and beauty. Wood frogs caught in autumn have more and more oil in their bellies. After drying, it is Rana chensinensis oil, also known as China Rana chensinensis oil or vanishing cream.

Rana chensinensis oil is the oviduct of female frog eggs at the stage of pregnancy and maturity. It contains 18 kinds of amino acids, 13 kinds of inorganic elements, 9 kinds of vitamins and a variety of compound peptides, especially three kinds of sex hormones: estradiol, testosterone and progesterone. Among them, estradiol and testosterone are the strongest hormones in female hormones and male hormones respectively, which have obvious effects of nourishing yin and tonifying kidney, stimulating immune function and regulating mechanism.

Rana Rana oil enjoys a high reputation in the international health food resource market, and it was a tribute as early as the Ming and Qing Dynasties. The demand has been very urgent, and the market capacity is large, so it is a product that cannot meet the demand.

Baidu encyclopedia-Rana oil