Understanding the interactions, benefits, and safety of combining these two powerful supplements.
We found no direct interaction between Arginine and Quercetin in the sources below, but they share a caution.
Both have a note about blood-pressure medicines (see each one below).
What it is: An amino acid the body makes and gets from protein foods. The body turns it into nitric oxide, which widens blood vessels.
What the research says: There's little evidence it improves strength, exercise performance or recovery.
In Holitro: Arginine (500 mg per capsule)
Sources: NIH Office of Dietary Supplements: Dietary Supplements for Exercise and Athletic Performance (updated March 2021); Memorial Sloan Kettering Cancer Center, About Herbs: Arginine (updated February 2022)
What it is: A plant compound found in apples, onions and tea; the most common flavonoid in the diet.
What the research says: It hasn't been shown to treat any disease. Its anti-inflammatory effects come from lab studies; in athletes, any performance benefits were small.
In Holitro: Quercetin (500 mg per capsule)
Sources: Memorial Sloan Kettering Cancer Center, About Herbs: Quercetin (updated October 2023); NIH Office of Dietary Supplements: Dietary Supplements for Exercise and Athletic Performance (updated March 2021)
Check with your doctor or pharmacist, especially if you take medication.
Check your stack — freeEducational information only, not medical advice. This reflects general ingredient overlap, not a personalized safety review. Always check with your doctor or pharmacist before combining supplements, especially if you take medication, are pregnant or nursing, or manage a health condition. These statements have not been evaluated by the FDA.
Balancing dosages across multiple different bottles is risky, inefficient, and expensive. Quercetin is already lab-dosed and delivered daily in our Antioxidant Pack — one less bottle to manage.
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