The concentration and application methods of L-Alanyl-L-Cystine vary depending on different use scenarios. Below are some common situations:
Ⅰ.Pharmaceutical Applications
1. Usage Concentration
Injectable Formulations: In compound amino acid injection solutions, the concentration of L-Alanyl-L-cystinefollows specific regulations. For example, in some compound amino acid injection solutions, 1000 ml may contain approximately 1.23 g of alanine and 0.61 g of L-cystine. This precise concentration ratio provides metabolic support and fulfills patients’ nutritional needs.
Oral Formulations: In oral nutritional supplements or medications for specific diseases, the content of L-Alanyl-L-Cystine is typically measured in milligrams per tablet or capsule. For example, each capsule may contain 200 mg - 300 mg of L-Alanyl-L-Cystine, with the exact concentration adjusted based on indications, patient age, and medical conditions.
2. Application Methods
Injection Administration: Typically administered by healthcare professionals, the injection solution containing L-Alanyl-L-Cystine is added to an appropriate infusion fluid and delivered via slow intravenous infusion. This ensures a steady and even release into the bloodstream for optimal therapeutic effects.
Oral Administration: It is usually taken with warm water, either before or after meals as directed in the product instructions. Patients with weaker gastrointestinal functions may be advised to take it after meals to reduce stomach irritation.
Ⅱ.Cosmetic Applications
1. Usage Concentration
Skincare Products: L-Alanyl-L-Cystine is commonly used as an active ingredient in skincare formulations for its moisturizing and antioxidant properties. Its concentration generally ranges from 0.1% to 2%. For example, some high-end serums may contain approximately 1% L-Alanyl-L-Cystine to enhance skin hydration and elasticity.
Haircare Products: In shampoos and conditioners, L-Alanyl-L-Cystine can help repair damaged hair and improve hair strength. The concentration typically falls within 0.5% - 3%. For instance, some professional hair-repair conditioners may contain 2% L-Alanyl-L-Cystine to penetrate hair fibers, repair damaged keratin, and make hair smoother and shinier.
2. Application Methods
Skincare Products: After cleansing the face, apply an appropriate amount of the L-Alanyl-L-Cystine-containing skincare product evenly to the skin and gently massage until fully absorbed. The recommended frequency is 1 - 2 times daily, depending on individual skin type and product instructions.
Haircare Products: Apply L-Alanyl-L-Cystine-containing shampoo or conditioner to wet hair, gently massage to ensure even distribution, and leave it on for 3 - 5 minutes before rinsing with water. It is typically used 2 - 3 times per week, with frequency adjusted based on hair condition and personal haircare needs.
Ⅲ.Food Applications
1. Usage Concentration
Nutritional Fortification: In special medical-purpose formula foods or sports nutrition products, L-Alanyl-L-Cystine is used as a nutritional fortifier. Its dosage depends on the nutritional needs of the target population and product formulation. Generally, 0.5 g - 2 g of L-Alanyl-L-Cystine may be added per 100 g of food to meet amino acid requirements and enhance immune function and recovery.
Flavor Enhancer: In certain food products, L-Alanyl-L-Cystine serves as a flavor enhancer. Its concentration is relatively low, usually ranging from 0.05% to 0.2%. For example, in processed meat products, an appropriate amount can enhance flavor and improve product quality.
2. Application Methods
Direct Addition: During food production, L-Alanyl-L-Cystine can be directly incorporated into raw materials according to formulation requirements. It is then evenly distributed through mixing and blending processes.
Dissolution Before Addition: For food systems where direct dispersion is difficult, L-Alanyl-L-Cystine can first be dissolved in an appropriate amount of water or another solvent to form a solution. This solution is then added to the food to ensure even distribution.
