Lysine is an essential amino acid for the human body (which cannot be synthesized by the body and must be obtained from food or supplements). Its core functions revolve around protein synthesis, immunity, energy metabolism, nerves and bones, and nutrient absorption, and it is a key substance for the growth, repair and defense of the body.

1. The "key key" for protein synthesis (the most core)

It is a necessary component of collagen, muscle protein, enzymes, hormones, antibodies, and determines the efficiency of protein synthesis.

It is called the first limiting amino acid: Lysine in staple foods (rice, flour) is extremely low, and even when other amino acids are abundant, they cannot efficiently synthesize proteins when lacking, directly leading to growth retardation, muscle loss, slow wound healing, and weakened immunity.

It participates in the construction and repair of tissues such as bones, skin, blood vessels, and tendons.

2. Enhancing immunity (the core of defense)

It promotes the synthesis of immunoglobulins (IgG), T/B cells, and cytokines, enhances the anti-infection ability, and reduces the risk of colds and respiratory infections.

It assists in inhibiting the replication of herpes viruses and reduces the recurrence of lip herpes.

3. Energy and metabolism regulation

It is a precursor for carnitine synthesis, helping long-chain fatty acids enter mitochondria for oxidation and energy supply, improving exercise endurance and alleviating fatigue.

It promotes the absorption of minerals such as calcium and iron, improving anemia and enhancing bone density.

It assists in regulating blood lipids and reducing "bad cholesterol", protecting the heart and blood vessels (cannot replace medication).

4. Support for nerves and cognition

It participates in the synthesis of neurotransmitters such as acetylcholine, dopamine, and serotonin, improving attention, memory, and mood.

It can pass through the blood-brain barrier, protecting nerve cells, repairing brain tissue damage, and used for the auxiliary treatment of head trauma and cerebral ischemia and hypoxia.

It assists in regulating melatonin synthesis and improving sleep rhythm (not an anesthetic).

5. Growth, development and nutritional improvement

Children / Adolescents: Promotes normal development of bones, muscles, and organs, improves loss of appetite, malnutrition.

Adults / Elderly: Relieves muscle loss, fatigue, and weakened immunity, improves protein absorption efficiency (about 30%).

Post-operative / Recovery period: Accelerates tissue repair, shortens recovery time.

Deficiency manifestations

Children: Growth retardation, affected intellectual development, poor immunity, easy fatigue, anemia.

Adults: Muscle atrophy, weakened immunity, slow wound healing, low mood, poor sleep.

Main food sources

High content: Meat, fish, eggs, dairy products, soybeans, quinoa, peas.

Low content: Grains such as rice, wheat, and corn (need to be combined with high-protein foods).

———————"From Doubao AI"