We have five factories and 23 years of experience in plant extracts
  • 0086-571-85302990
  • sales@greenskybio.com
Hangzhou greensky,Manufacturer of botanical extract
中文
Contact US

Technical Articles

We hold regular seminars and welcome inquiries if you have any questions

Let's talk
home > FAQ > Plant Extract > L-Cysteine: Complete Guide to Benefits, Applications and Quality

L-Cysteine: Complete Guide to Benefits, Applications and Quality

2026-04-20

What is L-Cysteine?

L-Cysteine is a semi-essential amino acid that plays a vital role in protein synthesis, detoxification, and antioxidant defense. It is a key component of glutathione, the body's master antioxidant, and is important for maintaining healthy skin, hair, and nails. L-Cysteine is widely used in dietary supplements, pharmaceutical products, and the food industry.

Key Benefits

  • Antioxidant Production: Essential precursor for glutathione synthesis, the body's most powerful endogenous antioxidant that protects cells from oxidative damage.

  • Detoxification Support: Plays a critical role in liver detoxification pathways, helping neutralize harmful toxins and free radicals.

  • Skin, Hair & Nail Health: Important component of keratin, supporting healthy hair growth, skin elasticity, and nail strength.

  • Respiratory Health: May help break down mucus and support respiratory function, commonly used in respiratory supplements.

  • Protein Synthesis: Essential building block for protein formation and tissue repair throughout the body.

Product Specifications

SpecificationDetails
Chemical NameL-Cysteine (2-Amino-3-mercaptopropanoic acid)
CAS Number52-90-4
Molecular FormulaC3H7NO2S
Molecular Weight121.16
Purity≥99% (HPLC)
Test MethodHPLC/USP
AppearanceWhite crystalline powder
SolubilitySoluble in water
StorageStore in cool, dry place, away from light
Shelf Life24 months
Packaging25kg/drum or customized

Applications

  • Dietary supplements for antioxidant and detoxification support

  • Pharmaceutical formulations

  • Food industry (dough conditioner, flavor enhancer)

  • Cosmetic and personal care products

Quality Standards

  • Manufactured in GMP-certified facility

  • Third-party lab tested for identity, potency, and purity

  • Free from heavy metals, pesticides, and microbial contamination

  • Compliant with USP, EP, and CP standards

TAGS:
Recommended Products
Get a Quote