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L-Arginine Side Effects

Even though L-arginine is a natural amino acid found in the human body, side effects can occur. When these supplements are taken orally, side effects may include stomach pain, bloating, and diarrhea. If you intravenously use L-arginine, side effects may include nausea, vomiting, and headaches. Although most people tolerate L-arginine well, serious reactions can occur, such as breathing problems or allergic reactions.

Does L-Arginine Cause Side Effects?

L-arginine is an amino acid produced by the human body. It is also found in many foods and dietary supplements. Just because L-arginine is a natural amino acid, however, it does not automatically mean that it is free of side effects.
For most people, these side effects are merely bothersome. In fact, most people tolerate the oral supplements quite well, often without any problems or just mild ones. Taking L-arginine intravenously (by IV) can also cause certain side effects.
(This article covers many, but not all, of the possible side effects with L-arginine. Your healthcare provider can discuss a more complete list of side effects with you.)

Bothersome L-Arginine Side Effects

Some people may experience bothersome side effects due to taking L-arginine orally, such as:
When taken by IV, L-arginine may cause the following problems:
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L-Arginine Supplements

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