Ascorbic Acid L-Cysteine Crystfan Injection 20mL 50 Tubes

Ascorbic Acid / L-Cysteine Crystfan Injection

Ascorbic Acid / L-Cysteine Crystfan Injection, also known as クリストファン注, is a Japanese injectable formulation containing ascorbic acid and L-cysteine. It is supplied as 20mL × 50 tubes and is intended for professional medical use under the supervision of qualified healthcare personnel.

Ascorbic acid, commonly known as vitamin C, is an essential water-soluble vitamin involved in antioxidant support, collagen formation and general metabolic function. L-cysteine is a sulfur-containing amino acid that participates in glutathione-related antioxidant pathways and protein metabolism. Together, these ingredients are used in clinical settings where vitamin supplementation is considered necessary due to increased demand or insufficient dietary intake.

In professional medical use, Crystfan Injection may be used for vitamin supplementation when the body’s requirement for the included vitamins increases and dietary intake is inadequate, such as during wasting conditions, pregnancy or lactation. Use should always follow medical evaluation, product label directions and local professional guidelines.

Product Information

• Product Name: Ascorbic Acid / L-Cysteine Crystfan Injection
• Japanese Name: クリストファン注
• Chinese Name: 美肌美白維他命C半胱氨酸配合劑
• Generic Name: Ascorbic Acid / L-Cysteine
• Main Ingredients: Ascorbic Acid and L-Cysteine
• Specification: 20mL × 50 tubes
• Dosage Form: Injection
• Route: Subcutaneous, intramuscular or intravenous administration by qualified healthcare professionals
• Manufacturer: Nissin Pharmaceutical Co., Ltd. / 日新製薬株式会社
• Origin: Japan
• Use: Professional medical use only

Key Features

• Japanese ascorbic acid and L-cysteine combination injection
• Contains vitamin C and L-cysteine in injectable form
• Used for vitamin supplementation when demand increases and dietary intake is insufficient
• Suitable for professional medical, clinical and aesthetic clinic settings where permitted
• May support antioxidant pathways and general metabolic function under medical supervision
• Supplied as 20mL × 50 tubes
• Can be administered subcutaneously, intramuscularly or intravenously by qualified professionals

About Ascorbic Acid

Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that plays an important role in the body. It contributes to collagen synthesis, antioxidant activity and normal metabolic processes. Vitamin C requirements may increase under certain physical conditions, and supplementation may be considered when dietary intake is inadequate.

About L-Cysteine

L-cysteine is a sulfur-containing amino acid involved in protein metabolism and antioxidant-related pathways. It is associated with glutathione production and may be used in combination with vitamin C in clinical formulations designed for metabolic and nutritional support.

Common Professional Uses

• Vitamin supplementation when dietary intake is insufficient
• Supplementation when vitamin demand increases
• Clinical support during wasting or consumptive conditions as medically assessed
• Supplementation during pregnancy under medical supervision
• Supplementation during lactation under medical supervision
• Professional beauty, wellness or medical aesthetic protocols where legally permitted and clinically appropriate
• Antioxidant and metabolic support under professional guidance

Indications

This product is indicated for supplementation when the demand for the vitamins contained in it increases and dietary intake is insufficient, such as in the following situations:

• Wasting or consumptive diseases
• Pregnancy
• Lactation
• Other medically assessed conditions where supplementation is considered necessary

Important Note: This product should not be used continuously for months if no effect is observed. Ongoing use should be reviewed by a qualified healthcare professional.

Directions for Use

This product is an injectable medicine and must be administered by qualified healthcare professionals only. It may be administered by subcutaneous, intramuscular or intravenous injection depending on professional judgement, patient condition, product label instructions and local medical guidelines.

• Typical Adult Dosage: 2 to 20mL per administration
• Frequency: Once or twice daily as directed by a healthcare professional
• Administration Route: Subcutaneous, intramuscular or intravenous injection
• Adjustment: Dosage may be adjusted according to age, symptoms and clinical condition
• Professional Use Only: Do not self-administer

Beauty and Skin Brightening Context

In the beauty and aesthetic market, vitamin C and L-cysteine combinations are sometimes associated with skin brightening, antioxidant support and beauty injection protocols. However, this product should be used according to approved medical indications and professional guidance. It should not be promoted as a guaranteed whitening treatment or used without clinical supervision.

Important Safety Information

Do not use this product if you are allergic to ascorbic acid, L-cysteine or any ingredient in the formulation. Consult a healthcare professional before use if you are pregnant, breastfeeding, have kidney disease, liver disease, metabolic disorders, G6PD deficiency, a history of kidney stones, iron overload disorders, asthma, chronic medical conditions or are taking any prescription or non-prescription medicines.

Possible reactions may include injection site pain, redness, swelling, discomfort, nausea, gastrointestinal upset, rash, itching, dizziness or allergic reactions. Seek immediate medical attention if severe rash, breathing difficulty, swelling of the face or throat, severe dizziness, chest discomfort, fainting or any severe reaction occurs.

Precautions

• For professional medical use only
• Do not self-inject
• Do not continue use for several months if no effect is observed
• Use during pregnancy or lactation only under medical supervision
• Dosage should be adjusted according to age, symptoms and clinical condition
• Monitor for effectiveness and adverse reactions during use
• Follow product label instructions and local medical regulations

Storage

Store according to the product label. Keep away from direct sunlight, excessive heat and freezing. Keep out of reach of children. Do not use if the tube, ampoule or packaging is damaged, leaking, discoloured, cloudy or past the expiry date.

Who Should Use This Product?

This product is intended for hospitals, clinics, medical aesthetic clinics, wellness clinics and qualified healthcare facilities where injectable medicines are legally and professionally administered. It is not intended for unsupervised personal use.

Disclaimer

This product information is provided for general reference only and does not replace medical advice, diagnosis, treatment, prescription instructions, product label information or local regulatory requirements. Injectable products should only be administered by qualified healthcare professionals. Effects, suitability and treatment outcomes may vary depending on individual health condition, nutritional status, medical assessment and treatment plan.