Betaine, a chemical, was first discovered by scientists in beets in the 19th century. Beets, similar to sugarcane, were once an important source of sucrose. During the processing of beet sugar, molasses became the main carrier of betaine, which gave the substance its name. So, what exactly is betaine? It is a quaternary amine alkaloid, essentially a trimethyl derivative of glycine, so it is also called N, N, N-trimethylglycine. In nature, betaine is widely present in a variety of animals, plants and microorganisms.
Since the 1940s, betaine has been widely used in feed for livestock, poultry and aquatic animals to promote animal growth and improve ketone body quality. With the deepening of research, the benefits of betaine in the human body have gradually emerged, such as improving body composition and preventing chronic diseases. The latest version of the "Dietary Reference Intake of Nutrients for Chinese Residents" has included betaine in the nutrient intake standard, further proving its indispensable position in the diet. Betaine has a wide range of biological effects, one of which is to provide active methyl groups to help reduce homocysteine (Hcy) levels. Hcy is an amino acid whose high levels are closely related to a variety of health risks such as heart disease and stroke. Betaine can effectively maintain the balance of Hcy levels in the blood by providing a methyl group to convert Hcy into methionine.
Save methionine and help protein synthesis
Methionine is an indispensable amino acid for protein synthesis, and betaine can effectively promote this synthesis process, significantly increasing the crude protein content in the liver and muscles. In addition, betaine also shows potential benefits for athletic performance and muscle strength. Several studies have shown that betaine supplementation can enhance endurance, reduce fatigue, and significantly increase muscle strength, providing strong support for the prevention and treatment of sarcopenia. A large domestic cohort study further confirmed that higher levels of betaine in serum are closely related to an increase in lean body mass percentage and a decrease in the risk of low lean body mass, especially in the male population. At the same time, this finding also reveals the positive effects of betaine on obesity-related sarcopenia.
Promote lipid metabolism and prevent lipid deposition in the liver
Betaine can promote the synthesis of phosphatidylcholine (PC), which is the key component of very low-density lipoprotein (VLDL). VLDL is responsible for transporting triglycerides from the liver to other parts of the body. Therefore, the role of betaine is to promote the transfer of liver lipids to the outside of the liver, thereby curbing the accumulation of lipids in the liver. Not only that, betaine also helps the decomposition of fat and inhibits its synthesis, providing strong support for the prevention of alcoholic or non-alcoholic fatty liver disease.
Regulate cell osmotic pressure and relieve environmental pressure
Betaine, a substance with bipolar zwitterionic properties and excellent water solubility, plays an important role in regulating organic osmotic pressure. It can enhance cell water retention, reduce the solubility of water molecules on proteins, and stabilize the structure of proteins. In renal tissue, betaine plays a core osmotic pressure regulation function, protecting renal medullary cells from damage by osmotic stress. At the same time, it can also regulate concentration gradients, control the accumulation of metabolic waste in urine, and provide protection for cells from the harm of high concentrations of electrolytes and urea.
Sources of betaine in the human body
Betaine, a substance that plays an important role in the body, has two main sources. One is exogenous intake, that is, through food intake, such as beetroot, spinach and other vegetables rich in betaine. The other is endogenous synthesis, where certain specific cells and organs in the human body, such as the kidneys, can synthesize betaine on their own. This dual source ensures that the human body can continuously and stably obtain the required betaine to meet its physiological needs.
The endogenous synthesis of betaine is often insufficient to meet our daily needs, so it is particularly important to ingest betaine through food. In the human diet, grains and their products are the main sources of betaine. However, it is worth noting that the loss of betaine during cooking may be as high as 60-80%, which further emphasizes the importance of food sources.
Betaine, an indispensable methyl donor and organic osmotic pressure regulator for the human body, plays a vital role in maintaining our health. Many studies have confirmed that betaine can effectively reduce Hcy levels. For people who maintain normal Hcy metabolism, a daily supplement of 5g betaine can achieve significant health benefits. Based on this, the Chinese Nutrition Society has proposed a specific recommended value (SPL) for betaine, which is 5g per day.
It is worth noting that when the intake of betaine exceeds 4g/d, it may increase the risk of dyslipidemia. Therefore, we recommend that the total amount of betaine an individual consumes from diet and supplements should be controlled within 4g/d. However, survey data on the dietary betaine intake of the Chinese population is still insufficient, and there are significant differences between regions. For example, the dietary betaine intake of men and women in Shanghai is 1 and 5mg/d, respectively, while the average intake of Guangzhou residents is as high as 259mg/d.
Before considering additional betaine supplementation, it is recommended to consult a clinical nutritionist to ensure safe and effective intake of this important nutrient.
Summary
Betaine, a nutrient with potential health benefits for both humans and animals, plays an important role in reducing homocysteine (Hcy) levels, promoting protein synthesis, and inhibiting liver fat deposition. According to the recommendation of the Chinese Nutrition Society, the daily suitable intake (SPL) of betaine is 5 grams, and the maximum tolerable intake is no more than 4 grams. This recommended value is intended to ensure that people can safely and effectively ingest this important methyl donor and organic osmotic pressure regulator.
