Fumaric Acid

What is it?

Fumaric acid is related to malic acid, and, like malic acid, it is involved in the production of energy (in the form of adenosine triphosphate [ATP]) from food.

Where is it found?

Fumaric acid is formed in the skin during exposure to sunlight, as well as being available as an oral supplement and as a preparation for topical use.

Fumaric acid has been used in connection with the following conditions (refer to the individual health concern for complete information):

Science Ratings	Health Concerns
	Psoriasis
Reliable and relatively consistent scientific data showing a substantial health benefit. Contradictory, insufficient, or preliminary studies suggesting a health benefit or minimal health benefit. For a herb, supported by traditional use but minimal or no scientific evidence. For a supplement, little scientific support and/or minimal health benefit.

Who is likely to be deficient?

No deficiencies of fumaric acid have been reported. However, some doctors suggest that people with psoriasis may have a biochemical defect that interferes with adequate fumaric acid production in the skin.

How much is usually taken?

Only the esterified forms of fumaric acid are used therapeutically, such as fumaric acid monoethylester or fumaric acid di-methylester. Healthy people do not need to supplement with fumaric acid. Those using this substance (either orally or topically) should work with a dermatologist, since determining the optimal intake should be done on an individual basis. Even under these circumstances, supplementing should be started with small amounts (60–100 mg per day) and increased gradually over several weeks until an effect is noted.

Are there any side effects or interactions?

Kidney disorders have been reported in people taking fumaric acid esters, possibly due to taking large amounts too quickly.¹ ² Most studies have reported gastrointestinal upset and skin flushing as common side effects; some have also found decreased white blood cell counts with prolonged use.³ ⁴ .

At the time of writing, there were no well-known drug interactions with fumaric acid.

References
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1. Dalhoff K, Faerber P, Arnholdt H, et al. Acute kidney failure during psoriasis therapy with fumaric acid derivatives. Dtsch Med Wochenschr 1990;115:1014–7 [in German].

2. Roodnat JI, Christiaans MH, Nugteren-Huying WM, et al. Acute kidney insufficiency in patients treated with fumaric acid esters for psoriasis. Ned Tijdschr Geneeskd 1989;133:2623–6 [in Dutch].

3. Kolbach DN, Nieboer C. Fumaric acid therapy in psoriasis: results and side effects of 2 years of treatment. J Am Acad Dermatol 1992;27:769–71.

4. Altmeyer P, Hartwig, R, Matthes U. Efficacy and safety profile of fumaric acid esters in oral long-term therapy with severe treatment refractory of psoriasis vulgaris. A study of 83 patients. Hautarzt 1996;47:190–6.

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The information presented in Healthnotes 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. For many of the conditions discussed, treatment with prescription or over the counter medication is also available. Consult your doctor, practitioner, and/or chemist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires March 2007.

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