OnePin Peptide Library · Cognitive & Mood
SAMe
SAM-e · S-Adenosylmethionine · S-Adenosyl Methionine · AdoMet
SAMe (S-Adenosyl-L-Methionine) is a methyl donor cofactor present in every cell, derived from methionine. It is the body's primary methylation agent, donating methyl groups for DNA methylation, neurotransmitter synthesis, phospholipid metabolism, and many other reactions. Unlike most supplements, SAMe is FDA-approved as a prescription drug in many EU countries (for depression and osteoarthritis) but sold as a dietary supplement in the US.
Morning preferred (mild stimulant).
Start here. Every protocol below is ordered lowest-first. Begin at the smallest effective dose, hold about a week to assess tolerance, and step up only if needed.
How it works
SAMe is the universal methyl donor in the cell:
Methylation Reactions
SAMe donates methyl groups to DNA, proteins, phospholipids, neurotransmitters, and many small molecules. Converts to SAH (S-adenosylhomocysteine), then back to homocysteine and methionine via methylation cycle.
Neurotransmitter Synthesis
Required for synthesis of catecholamines (dopamine, norepinephrine) and serotonin precursor reactions.
Phospholipid Metabolism
Supports neuronal membrane phospholipid synthesis (phosphatidylcholine via methylation of phosphatidylethanolamine).
Joint Cartilage
Stimulates proteoglycan synthesis in chondrocytes - basis of osteoarthritis indication.
Liver Glutathione
Methionine cycle intersects with cysteine and glutathione synthesis - supports hepatic detoxification.
Bioavailability Critical
SAMe is unstable and rapidly degraded by stomach acid. Enteric coating or butanedisulfonate stabilization is essential for absorption.
What to expect
Days 1-14: faster onset than SSRIs.
Weeks 2-4: peak antidepressant effect.
Long-term: sustained effect.
Evidence
Interactions & stacking
What's safe to combine, and what belongs in a separate pin.
Keep separate
Side effects & safety
Commonly reported
- Mild stimulation / anxiety (early dosing)
- Insomnia (PM dosing)
- Mild GI upset
Less common & notes
- MANIA in bipolar patients - critical contraindication.
- L-DOPA antagonism in Parkinson's.
- Allergic reactions rare.
- Long-term safety good per EU pharmaceutical use.
Pharmacokinetics
Storage. Tablet. Cool dry location. Light-sensitive.
Regulatory status
Pharmaceutical drug in EU (depression, osteoarthritis, cholestasis). Dietary supplement in US (DSHEA).
Put it to work
Calculate, log & track
Open SAMe straight into OnePin with your vial and dose pre-filled, then let it handle the syringe math and remind you before the vial runs out.
Open SAMe in the app →Go deeper
The guide & community
The complete SAMe walkthrough, real protocol discussion and coaching live inside the BlessUp community on Skool.
Join the community ↗