Does SAM-e (S-adenosylmethionine) work?

Read Off Label rates the evidence for SAM-e (S-adenosylmethionine) as Moderate and the benefit magnitude as moderate, producing an overall grade of B- (6.3/10). Enteric coating and proper storage (cool, dry) are essential — SAM-e degrades readily.

Is SAM-e (S-adenosylmethionine) safe?

SAM-e (S-adenosylmethionine) has a low-med risk profile in published human data. Legal status: Rx in EU; OTC in US. This is not medical advice — see the disclaimer.

Rankings / Mood, Anxiety & Stress

SAM-e (S-adenosylmethionine)

Mood, Anxiety & Stress · Methyl donor

Tier B-

Reviewed by Read Off Label · Last reviewed Jun 8, 2026 · How we grade

methylationprescriptionotc

6.3 / 10

Tier B-

Ev 6 Bn 5 Sf 7

Bottom line

Read Off Label grades SAM-e (S-adenosylmethionine) as B- (6.3/10) based on moderate evidence, moderate benefit magnitude, and a low-med-risk safety profile.

Enteric coating and proper storage (cool, dry) are essential — SAM-e degrades readily.

Typical use: 400-1600 mg/day PO divided, enteric-coated, empty stomach — Rx in EU; OTC in US.

What this is

Enteric coating and proper storage (cool, dry) are essential — SAM-e degrades readily. Papakostas 2010 trial showed SSRI augmentation benefit in MDD nonresponders. Expensive relative to other antidepressant augmentation options. Bipolar screening important (has triggered hypomania/mania case reports).

Mechanism

Endogenous methyl donor; essential cofactor for methylation reactions including neurotransmitter synthesis and phospholipid production; influences homocysteine and folate cycle

Dose & route

400-1600 mg/day PO divided, enteric-coated, empty stomach

Citations

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Common questions

Does SAM-e (S-adenosylmethionine) work?: Read Off Label rates the evidence for SAM-e (S-adenosylmethionine) as Moderate and the benefit magnitude as moderate, producing an overall grade of B- (6.3/10). Enteric coating and proper storage (cool, dry) are essential — SAM-e degrades readily.
Is SAM-e (S-adenosylmethionine) safe?: SAM-e (S-adenosylmethionine) has a low-med risk profile in published human data. Legal status: Rx in EU; OTC in US. This is not medical advice — see the disclaimer.
What is the typical dose for SAM-e (S-adenosylmethionine)?: 400-1600 mg/day PO divided, enteric-coated, empty stomach
How does SAM-e (S-adenosylmethionine) work?: Endogenous methyl donor; essential cofactor for methylation reactions including neurotransmitter synthesis and phospholipid production; influences homocysteine and folate cycle

This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.