The natural one
L-methionine
The form your body uses. Usually part of hair, nail, or liver formulas rather than sold alone.
What variations of L-methionine exist?
An essential amino acid that supplies sulfur. Your body uses it to make SAMe, glutathione, and the protein in hair and nails. It comes in 3 forms, and they aren't all the same. Here's how they differ.
Medical Disclaimer
For education only. What's right for you depends on your health and your medications, so check with your provider before you start or switch. Book a consult
Our top pick
- Also consider
- Mood: the next step (SAMe)
- Achy joints: the next step (SAMe)
Every form, in plain words
The natural one
L-methionine
The form your body uses. Usually part of hair, nail, or liver formulas rather than sold alone.
The next step
SAMe
Your body makes SAMe from methionine. Often chosen instead for mood and achy joints.
Good for: Mood · Achy joints
Usually skip
- The half-strength mix (DL-methionine)Half of it is a version your body uses less well. More common in urinary and pet products.
Spotting a good one on the shelf
Look for
- Look for 'L-methionine' on the label (the natural one)
Watch out for
- Hair and nail blends that hide amounts in a proprietary mix
Check with your provider first if…
- You have high homocysteine (a blood marker), heart disease, or have had blood clots. Methionine can raise homocysteine.
- You have liver disease, especially cirrhosis
- You have schizophrenia. Large amounts have made symptoms worse.
- You take levodopa for Parkinson's. Methionine may make it work less well.
- You're pregnant or breastfeeding
Ready to find the root cause?
Dr. Lesher is a Naturopathic Doctor who focuses on autoimmune and chronic conditions in women. Since 2020, she's helped hundreds of patients stop managing symptoms and start healing.