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L-Citrulline & L-Arginine – This pairing of scientifically studied amino acids can contribute to significantly improved nitric oxide synthesis. L-arginine is naturally converted into nitric oxide via enzymatic reactions in the human body. L-citrulline acts as a precursor to L-arginine. When ingested orally, it can elevate internal L-arginine levels. An animal study published in Biochemical and Biophysical Research Communications reported that combined L-citrulline and L-arginine can greatly enhance nitric oxide levels and blood flow parameters, far more than either could alone. Epimedium Leaf Extract: Sometimes referred to as “horny goat weed,” epimedium leaf is a celebrated libido booster in Asia. It’s also been regularly used to mitigate erectile difficulties. The plant contains a biochemical compound called icariin, which can aid the body in nitric oxide utilization. An animal study of subjects with penile nerve issues showed that insulin ingestion improved penile blood flow and erectile wellness after four weeks. Those guys using VigRX Plus reported experiencing improved orgasms, greater sexual desire, enhanced sexual satisfaction, and better overall satisfaction. Additionally, 90% of the men using VigRX Plus said they wished to continue using the supplement post-study.