The earth tea oil contains many impurities, not only affect the preservation of earth tea oil and the quality of the oil, but also affect the stir-frying, frying food color and flavor, some impurities and even toxicity and carcinogenic effect.

The edible earth tea oil only through the drying, crushing, pressing, filtration and other simple processes, so that the tea oil pressed out contains more impurities, only a semi-finished product.

The main components are mechanical impurities, phospholipids, saponins, proteins and other water-soluble impurities, as well as water, these substances are easy to make microbial reproduction, causing mold and quality change. In the process of rancidity, some peroxides will be produced, and peroxides are one of the carcinogenic substances.

And in the use of earth tea oil frying, will be found in the heating of the earth tea oil fuming, sometimes produce a choking odor. Earth tea oil contains a small amount of phosphorus esters, free fatty acids and other organic impurities, phosphorus esters are not only used in the appearance of cloudy, dull, and in cooking will produce a large number of bubbles and generate black precipitate, affecting the stir-frying, frying food color and flavor.

Extended information:

The national standard "GB11765-2003 - Camellia oil", 3.3 of the definition of Camellia oil: without any treatment can not be directly used for human consumption of Camellia oil. It can be seen that the consumption of the so-called "soil tea oil" will jeopardize personal health.

May 1, 2004 onwards, the national health epidemic prevention and quality inspection departments expressly prohibit the sale of unrefined cooking oil.

The crude oil processed through advanced pressing technology, and then after the removal of impurities, deacidification, deodorization, degreasing, and a series of rigorous and complex refining procedures produced by the tea oil can be called "refined tea oil", refined tea oil quality is better, preserving the rich nutritional value of the tea oil itself and the trace elements. Therefore, the purchase of regular qualified brand of tea oil is safer than the soil tea oil.

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