Doppelholz L -Citrullin - 210 x 600 mg Kapseln

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The Active Ingredient Is: L-Citrulline

L-Citrulline is an amino acid that supports the body's production of nitric oxide, contributing to normal blood flow and circulatory health.

This form is supplied as L-Citrulline, a single-ingredient amino acid used in dietary supplements to support athletic performance and circulatory function. The product is manufactured in the USA and is non-GMO, gluten-free, and soy-free.

What Does L-Citrulline Do?

L-Citrulline increases blood levels of L-Arginine, which directly supports nitric oxide synthesis to help maintain efficient circulation and endurance during activity. This mechanism can contribute to improved energy production and reduced fatigue during sustained exercise, in line with scientific findings from researchers at the University of Granada.

Dr. Perez-Guisado of the University of Granada found that L-Citrulline may support vascular health and exercise performance through the arginine–NO pathway, highlighting its role in normal muscular and circulatory function.

This supplement is not intended to diagnose, treat, cure, or prevent any disease.

Double Wood Supplements stands out in our evaluation for its clear dedication to quality, transparency and American manufacturing. This brand is recognised for producing L-Citrulline in the USA and prioritising non-GMO, gluten-free and soy-free formulations, which aligns with Welzo’s commitment to purity and potency. Our team of medical experts reviewed Double Wood within the framework of our quality standards, emphasising rigorous third-party testing for purity and potency and a straightforward, consumer-friendly sourcing story. You can learn more about our evaluation process and the exact criteria used by our experts our team of medical experts and our quality certification process.

This brand’s heritage of transparent manufacturing and a focus on safe, clean ingredients made them a natural fit for a single-ingredient supplement like L-Citrulline. The product aligns well with Welzo’s product fit criteria, and our vetting panel selected Double Wood for its demonstrated commitment to quality, safety and consistency. This partnership is grounded in our structured evaluation approach and a shared emphasis on reliable supply and consumer trust.