Based on 197 reviews
It is part of my covid prevention protocol. I haven't gotten covid so I'm assuming that it is working.
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The Quercetin double pack is a good buy and is the only way to go if you want to sale some money. Quercetin has powerful antioxidant properties and may help protect against certain health conditions, including heart disease.
I use it along with my immune vitamins.
It is working for me