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home > FAQ > Plant Extract > L-Methionine: Complete Guide to Benefits, Applications and Quality

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

2026-04-20

What is L-Methionine?

L-Methionine is an essential sulfur-containing amino acid that the body cannot synthesize and must be obtained through diet or supplementation. It serves as a precursor for numerous important compounds including cysteine, taurine, glutathione, and S-adenosylmethionine (SAMe). L-Methionine plays a crucial role in protein synthesis, detoxification, and cellular metabolism.

Key Benefits

  • Antioxidant Production: Essential precursor for glutathione synthesis, supporting the body's primary antioxidant defense system against oxidative stress.

  • Liver Health: Supports liver function and detoxification processes, helping protect against fatty liver disease and toxin accumulation.

  • Hair, Skin & Nails: Provides sulfur necessary for keratin production, promoting healthy hair growth, skin integrity, and strong nails.

  • Mood Support: Precursor to SAMe, which plays a role in neurotransmitter production and may help support mood and cognitive function.

  • Fat Metabolism: Supports healthy fat metabolism and may help prevent fat accumulation in the liver.

Product Specifications

SpecificationDetails
Chemical NameL-Methionine (2-Amino-4-methylthiobutanoic acid)
CAS Number63-68-3
Molecular FormulaC5H11NO2S
Molecular Weight149.21
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 liver health and detoxification

  • Animal feed and pet nutrition

  • Pharmaceutical formulations

  • Infant formula and clinical nutrition

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

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