Amino Acid
L-Methionine
Also known as: Methionine
B
Evidence
Essential sulfur amino acid. Precursor to cysteine, taurine, and SAM-e.
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Primary uses
- Sulfur source
- SAM-e precursor
- Liver support
- Detox
How it works
- Precursor to cysteine and taurine
- Methyl donor (as SAM-e)
- Antioxidant support
Dosage
- Typical range
- 500-1500mg daily
- Timing
- Between meals
- With food
- Optional
- Duration
- Moderate duration
- Special populations
- Liver support, sulfur support
Forms
- Capsules
- Powder
Safety
Common side effects
- GI upset
Contraindications
- High homocysteine
- Schizophrenia
Products containing L-Methionine
Top-scoring supplements in our catalog that list L-Methionine on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
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Evidence notes
Essential amino acid
Grade B: Some human trials support key claims; further confirmation needed.
Related in Amino Acid
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