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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. Ashwagandha Root Extract: A shrub that grows wildly in India, ashwagandha (Withania somnifera) is commonly used in Ayurvedic practices. It’s believed to enrich vitality and sexual wellness in men. An 8-week study of 50 men with reduced libido reported ashwagandha supplementation was associated with an uptick in perceived sex drive. Respond to your body’s reactions. If you experience any adverse effects, lower your dosage. Similarly, if the effects aren’t strong enough at your current dose, gradually increase it while monitoring your body’s response.