As an essential amino acid, lysine is required for the body to function properly. Just like vitamins and minerals, it is naturally present in some foods. That’s to say, people can get this nutrient by consuming foods high in lysine. But, even so, a tiny minority might still suffer from a lysine deficiency, especially when they come from rice-eating countries. In this case, the answer to what foods contain l-lysine means a lot to them.
As a component of proteins, lysine is usually found on protein-rich foods, such as meat, dairy products and beans. Dairy products include yogurt, cheese, butter, ice cream, milk, and so on. Because cereals or peanuts do not contain lysine that is readily available and needed by the body, people who exist on cereals should eat more fruits and vegetables, such as carrots, edamame, potatoes, tomatoes, broad bean, celery, broccoli, pear, garlic, persimmon, spinach, apple, leaf mustard, apricot, wheatgerm, soybean sprout, pineapple, bamboo shoot, and Chinese chive. Besides, it is also recommended to eat cheese, lean beef and lamb, turkey and chicken, fish, eggs, pork, sea food, eggs, and so on.
Among various amino acids in protein synthesis, L-lysine is the most important one and called the first amino acid by scientists. This is because when the body is in short of it the other amino acids will be restricted or not utilized. Scientists also found that this is an important and most essential ingredient of somatostatin (SS), a hormone that inhibits the secretion of several other hormones. That’s to say, it plays an important role in human central nervous system and peripheral nervous system.
Given that human body cannot synthesize this substance, this essential amino acid has to be obtained from food sources in order to help other nutrients fully absorbed and utilized by human body. In this case, it achieves balanced nutrition and promotes healthy growth and development.
Lysine means a lot to the developing organs of a fetus or child since the daily requirement of a child is higher than that of an adult. So, a lack of this nutrient at this stage is very likely to cause many health problems. And lysine deficiency can be caused by routinely eating cereals without adding other foods. As mentioned above, cereal contains relatively low lysine content, for example, 295 mg in 100 grams of rice or 277 in 100 grams of flour. This figure is equivalent to only that in 20 grams of beef or 10 grams of soybean.
The lack of lysine can cause anorexia and nutritional anemia due to insufficient stomach acid production, followed by underdeveloped central nervous system. In addition, such deficiency can also lead to hair loss, lack of concentration, weight loss, bloodshot eyes, reproductive disorders, fatigue, loss of appetite, and more. In general, people who are following a low protein diet or with eating disorders are more likely to suffer from the mentioned symptoms.
A deficiency of L Lysine is rare these days. When children have this health problem, generally the related supplement can work up an appetite and help them gain weight. At the same time, it is a good idea to get it from dietary sources by giving them more lysine rich foods, such as dairy, meat, fish, eggs, soy and soy products.