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SAMe

Supplement methyl donor brain & moodbone & joint
Aka: S-adenosyl-L-methionine, SAMe, ademetionine
Brands seen in Singapore: California Gold Nutrition, Doctor's Best, NutraLife, Life Extension, Nutricost
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Mood and joint research — NCCIH: evidence not conclusive
When to take
Daily · CNS trials often split it into 2 to 4 doses
Pros & cons
Pros
  • Side effects are uncommon, usually mild gut upset
  • Joint trials vs NSAIDs: similar relief, fewer effects
  • One 2-year study reported no serious side effects
Cons
  • NCCIH: results for mood and joints are not conclusive
  • Against placebo the joint results were inconsistent
  • Long-term and pregnancy safety data are too limited
Sources
  1. NCCIH — S-Adenosyl-L-Methionine (SAMe): In Depth (What's the Bottom Line?), last updated January 2017 · read 2026-08-27
    what it says
    “Although there are hints that it might be helpful for these conditions, the evidence is not conclusive … Data on the long-term safety of SAMe and its safety for use during pregnancy are too limited to draw any conclusions.”
  2. NCCIH — SAMe: In Depth (What the Science Says About the Effectiveness of SAMe) · read 2026-08-27
    what it says
    “SAMe has been investigated most extensively for depression, osteoarthritis, and liver diseases. For all three conditions, research has not conclusively shown that SAMe is helpful.”
  3. NCCIH — SAMe: In Depth (Depression: study quality and length) · read 2026-08-27
    what it says
    “At least 40 studies in people have evaluated SAMe for depression … most of these trials lasted only a few weeks, included a small number of participants, and were not of the highest scientific quality.”
  4. NCCIH — SAMe: In Depth (Osteoarthritis) · read 2026-08-27
    what it says
    “studies that compared SAMe with NSAIDs showed that each had similar pain relief and improvement in joint function, with fewer side effects … studies that compared SAMe with placebo did not consistently show SAMe to be beneficial.”
  5. NCCIH — SAMe: In Depth (Safety and Side Effects: duration and bipolar disorder) · read 2026-08-27
    what it says
    “in one study of alcohol-related liver disease, participants took SAMe for 2 years; in that study, no serious side effects were reported. People with bipolar disorder … should not take SAMe … because SAMe may worsen symptoms of mania.”
  6. NCCIH — SAMe: In Depth (Safety and Side Effects: nature of side effects) · read 2026-08-27
    what it says
    “Side effects of SAMe are uncommon, and when they do occur they are usually minor problems such as nausea or digestive upsets.”
  7. NCCIH — SAMe: In Depth (Safety and Side Effects: drug interactions) · read 2026-08-27
    what it says
    “SAMe may decrease the effects of levodopa (L-dopa), a drug used to treat Parkinson's disease … SAMe might interact with drugs and dietary supplements that increase levels of serotonin … such as antidepressants, L-tryptophan, and St. John's wort.”
  8. NCCIH — SAMe: In Depth (Safety and Side Effects: immunocompromised people) · read 2026-08-27
    what it says
    “There's a theoretical concern about the use of SAMe by people who are immunocompromised … Immunocompromised people are at risk for Pneumocystis carinii infection, and SAMe enhances the growth of this microorganism.”
  9. S-Adenosylmethionine (SAMe) for Central Nervous System Health: A Systematic Review (Baden et al., Nutrients 2024; 36 studies) — dosing and adverse events · read 2026-08-27
    what it says
    “When used in CNS-related conditions, SAMe dosing ranged from 200 to 3200 mg, with the most common dose being 800 mg. In many studies, SAMe was titrated up to the target dose and/or divided into two to four doses daily.”
  10. HSA — Guidelines on Prohibited and Restricted Ingredients in HS and TM, Version 1 (Oct 2025), Annex A and Annex B — searched, no row for this ingredient · read 2026-08-27
    what it says
    “A list of such ingredients and recommended risk mitigation measures can be found in Annex B. This list is not exhaustive. Dealers are responsible to ensure that their products are safe”
  11. iHerb Singapore — SAM-e category, page titled 'SAM-e for Pain and Inflammation' (default order, 1 - 32 of 32 results) · read 2026-08-27
    what it says
    “California Gold Nutrition, SAMe, Disulfate Tosylate, 400 mg … Doctor's Best, SAM-e, 400 mg … NutraLife, SAMe, 400 mg … Life Extension, SAMe S-Adenosyl-Methionine, 400 mg … Nutricost, SAMe, 120 Capsules (200 mg per Capsule)”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.