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Amino acidsNo evidence

L-methionine

Also known as: methionine

Methionine is an essential sulphur amino acid the body uses to make cysteine, taurine and the methyl donor SAMe. Most people get enough from food.

What it is used for

  • Hair and nail support – no reliable evidence
  • Liver support – weak evidence, research mostly clinical

Forms and how they differ

L-methionine

standard form in capsules and tablets

DL-methionine

mixed forms, used mainly in animal feed

When to take it

With food.

Pairs well with

Vitamins B6, B12 and folate, which help process homocysteine.

Do not combine / separate

Do not combine with other methionine-containing supplements without totalling the dose.

Watch out for

Higher doses may raise homocysteine. Caution with liver disease, cardiovascular disease and schizophrenia. Consult your doctor or pharmacist if you are pregnant, breastfeeding, have kidney or liver disease or take any medicines.

Safety

Do not exceed the label dose.

Practical tip

For hair and nails, checking iron, zinc and total protein intake is usually more useful.

Products containing L-methionine 2

L-methionine free form 500 mgfree form · 500 mg / capsuleLiverHair & nails
L-methionine 500 mg500 mg / capsuleLiverHair & nails
How to read the evidence rating
Strong evidenceModerate evidenceWeak evidenceNo evidence

Strong = several good human studies or official recommendations; moderate = promising but smaller studies; weak = few studies or mixed results; no evidence = claims not confirmed.

Combination check

Select the supplements you take and, if relevant, your medicines. We show what interferes, what needs a time gap and what to watch out for.

Check L-methionine with others

Which supplements do you actually need?

Fénix Methode picks them from your blood results and schedules when to take what – no needless purchases.

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Important notice

This information is educational and does not replace advice from a doctor or pharmacist. We do not give medicine dosages. Supplements are no substitute for a varied diet; if pregnant, breastfeeding, ill or on medication, consult a doctor first.