Dangers of Malic Acid

Written by joel le blanc
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Dangers of Malic Acid
Apples are the best food source of malic acid. (apples image by Harvey Hudson from Fotolia.com)

An apple a day keeps the doctor away, but what about malic acid? Apples are one of the best food sources of malic acid, a natural chemical that can increase energy production in your cells, improve your athletic performance, and alleviate symptoms in patients with fibromyalgia and chronic fatigue syndrome. You may wonder whether malic acid is safe when taken alone as a supplement and what side effects you can expect while taking it.

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Safe Dosage

The recommended safe and effective dosage range for malic acid nutritional supplements is 1,200 to 2,400 mg daily. A 1995 study by the University of Texas Health Science Center found this dosage range to be effective, safe, and free of side effects in treating fibromyalgia symptoms in 24 patients.

Malic acid should be safe when taken as prescribed.
Malic acid should be safe when taken as prescribed. (Fallen brown bottle of last yellow pills isolated on white image by Olga Sapegina from Fotolia.com)

Allergies and Sensitivities

If you are allergic or sensitive to malic acid, you should avoid it and thoroughly wash skin that comes into contact with it. If malic acid comes into contact with your eyes, immediately flush them with cold water and seek medical attention. You can find malic acid in some cosmetic products, despite the fact that it may be a strong skin irritant and cause dermatitis. If taking malic acid internally causes shortness of breath, difficulty swallowing, or digestive discomfort or burning, seek medical attention.

Dangers of Malic Acid
Malic acid is often an ingredient in cosmetics. (cosmetic image by Andrey Kiselev from Fotolia.com)


High doses of malic acid have been reported to cause diarrhoea, nausea, and vomiting. This may be because the chemical structure of malic acid is very similar to that of magnesium, which also causes diarrhoea in doses greater than 5g daily. If you stay within the recommended dosage range of malic acid, you should be able to avoid these symptoms.

Dangers of Malic Acid
Malic acid may cause digestive problems. (sign for toilet/ unisex. toilet access. portaloo image by L. Shat from Fotolia.com)

Pregnancy & Breastfeeding

You should avoid malic acid during pregnancy and breastfeeding. Not enough information is available on the effects of malic acid during pregnancy and breastfeeding, so it's best to avoid it in its supplemental form.

Avoid malic acid during pregnancy and breastfeeding.
Avoid malic acid during pregnancy and breastfeeding. (Waiting image by Kristin Skipper from Fotolia.com)

Blood Pressure

Malic acid may reduce blood pressure. If you have low blood pressure or take medication to control your blood pressure, you should consult your health care professional before taking malic acid as a supplement.

Dangers of Malic Acid
Avoid malic acid if you have low blood pressure. (blood pressure image by Cristina Bernhardsen from Fotolia.com)


Malic acid is known to cause allergic reactions and other side effects in some groups of people, and because of this it is not recommended for everyone. All readers are urged to consult with their health care professional before taking any form of malic acid supplements.

Malic acid supplements are not recommended for everyone.
Malic acid supplements are not recommended for everyone. (warning image by Mat Hayward from Fotolia.com)

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