The medium chain triglyceride (medium-chain triglycerides, MCT), which refers to a saturated fatty acid with a 8-12 carbon chain length, is naturally found in palm kernel oil, coconut oil and other foods and breastmilk. MCT is one of the important sources of dietary fat, mainly composed of caprylic acid and caprylic acid glyceride.
The advantages of MCT
As a kind of edible oil, MCT is widely used in the preparation and processing of many kinds of food. It has many advantages, including excellent oxidation stability, excellent cooling stability, low viscosity, good solubility, good lubricity, and unique metabolic pathway.
Oil oxidation is the main cause of rancidity. In general, the peroxide value of fresh oil is less than 2.36 (mmol/kg oil); when the peroxide value is 2.36-4.73, sensory taste is not abnormal; when higher than 7.9, oil appears unpleasant spicy taste and other stimulant odors; if over 11.82, it can cause vomiting and abdomen. Diarrhea and other symptoms of poisoning. The national standard is 10mmol/kg.
A better oxidation stability is also a characteristic of a relatively small polymerization at high temperatures, which is essential when these oils are used as demoulding agents in the baking food industry. For 24 hours at 230 C, the stickiness of vegetable oil, such as soybean oil and botanical oil, is greatly increased and even turned into brown and yellow plastic, but in the same case, the viscosity of MCT only reaches the viscosity of plant oil at room temperature.
The melting point of the high purity of the triglyceride is 30 degrees centigrade; the melting point of the high purity of the octanoic acid ester is about 15 degrees centigrade; the melting point of triglycerides containing the mixture of C8 fatty acids and C10 fatty acids is very low, only 15 degrees Celsius below zero. These oils can be stored at very low temperatures without worrying about their crystallization or heating. This will bring great convenience to the food industry, especially when these oils are sprayed in liquid form, a little crystallization is bound to clog the nozzle.
Medium-chain triglycerides also have an important property in the food industry - their solubility differs from natural vegetable oils. Medium-chain triglycerides have shorter fatty acid chains and are particularly hydrophilic, so they can easily be dissolved in any concentration of alcohol. This characteristic is often applied in the production of spices.
Metabolic characteristics of MCT
The human intake of MCT can be decomposed into glycerol and medium chain fatty acids in the stomach and duodenum. The medium chain fatty acid is transferred directly through the portal vein to the liver. It is rapidly decomposed into energy and is decomposed to the peak in 3 hours and is completely decomposed in 10 hours; the digestion and absorption rate of middle chain fatty acid is about long chain fat. 4 times the fatty acid. Because of the decrease in bile and pancreatic secretion caused by diseases, the digestion of medium chain fatty acids is better. Most of the medium chain fatty acids are transported to the portal vein in the form of free fatty acids and protein in the form of free fatty acids, then transported to the liver and into mitochondria, which are rapidly oxidized and decomposed, which does not lead to the accumulation of fat in the liver and in the body.
Food addition industry
In the food industry, medium chain triglycerides can be used as a solvent and carrier for edible flavors and pigments; in the processing of baked foods, medium chain triglycerides are often combined with cheap vegetable oils, used as a tackifier to prevent baked foods from sticking to a pot or mold; a pure medium chain triglyceride or a mixture of plant oils. Oil is also used as a lubricant and mold release agent for sausage mold pressing.
In addition, MCT can also be used to deal with all kinds of fat soluble vitamins, pigments and antioxidants. When a small amount of MCT is added, the viscosity of high viscosity fatty substances will be greatly reduced; in the food processing industry, MCT is used instead of oxidizing milk fat to make milk and cheese imitation; if it is with water-soluble colloid In combination, MCT can also be used as a turbidity agent for drinks.
Special medical food
MCT can be used as a special food for patients after surgery, infection and skin burns. It can also be used in those with fat absorption, AIDS and cancer patients and diabetic patients. It can be used to treat prostatic hyperplasia, cholelithiasis, lower cholesterol, and hyperlipidemia. The treatment of epilepsy can be improved by using the ketogenic diet prepared by MCT; MCT can inhibit the metabolism and growth of the tumor and maintain the nutritional status of the patient.
MCT can also be used in the field of sports nutrition. As a source of energy, the synergistic supply of MCT with carbohydrates can prolong the energy release time, and can effectively maintain the energy needs of the athletes during their long time movement. In addition, it can help to lose weight. Studies have shown that dietary medium-chain fatty acid ester MCT has significant effects on body weight loss, abdominal fat area reduction, waist circumference reduction.
Because of its high energy and easy absorption, MCT is also widely used in poultry and livestock breeding. Medium chain triglycerides were added to the feed, the weight of piglets was increased, the sow's milk was stable, and the hens laid eggs. In addition, MCT also improves the resistance of poultry and livestock to disease.
Safety and related laws and regulations
Clinical studies have shown that MCT is safe. Most clinical studies do not see that MCT has adverse effects on liver function and renal function. A number of countries have promulgated relevant laws and regulations on MCT. The medium chain triglyceride can be used as a food raw material or emulsifier according to the national standard for food safety, "the general rules for formula food for special medical applications" (GB25596-2010) and the national standard for food safety (GB2760-2014). When the medium chain triglyceride is used as the raw material for food
July 27, 2018
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