What Products Have Arginine? A Guide to Natural Sources and Supplements
                                
                                
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                                    4 min read                                
                            
                                L-arginine, a semi-essential amino acid, is involved in numerous physiological processes, most notably its role as a precursor to nitric oxide, a compound that helps widen blood vessels and improve blood flow. What products have arginine, and how can you ensure you get enough of this important nutrient?