
S-adenosyl-l-methionine (SAMe) is an important biological agent in the human body, participating in over 40 essential biochemical reactions.
Healthy people do not need to take this supplement. Researchers working with people suffering from a variety of conditions have been using these amounts of SAMe: depression, 1,600 mg per day; osteoarthritis, 800–1,200 mg per day; fibromyalgia, 800 mg per day; liver disorders, 1,200 mg per day; and migraine, 800 mg per day.
Where to Find It
SAMe is not abundant in the diet, though its precursor, the amino acidmethionine is plentiful in many protein foods. It is not known whether increasing one’s intake of methionine will increase the body’s production of SAMe. Supplements of SAMe have been available in the U.S. since 1997.
SAMe is normally produced in the liver from the amino acidmethionine which is abundant in most diets. Folic acid and vitamin B12 are necessary for the synthesis of SAMe, and deficiencies of these vitamins results in low concentrations of SAMe in the central nervous system.1 Low blood or central nervous system levels of SAMe have been detected in people with cirrhosis of the liver,2coronary heart disease,3Alzheimer’s disease, and depression.4
Certain medicines interact with this supplement.
| Some medicines may increase the need for this supplement. | |
| Some medicines interact with this supplement, so they should not be taken together. | |
| Some interactions between this supplement and certain medicines require more explanation. Click the link to see details. |
| Amitriptyline | |
| Amoxapine | |
| Clomipramine | |
| Desipramine | |
| Doxepin | |
| Imipramine | |
| Nortriptyline | |
| Protriptyline | |
| Trimipramine |
Clinical trials in thousands of people for up to two years have demonstrated that SAMe is very well tolerated, much better than the medications with which it has often been compared.5, 6 Occasional gastrointestinal upset may be experienced by some people. Researchers treating people with bipolar disorder (manic depression) have reported that SAMe could cause them to switch from depression to a manic episode.7, 8
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The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. Self-treatment is not recommended for life-threatening conditions that require medical treatment under a doctor's care. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2013.