Contrary to what you have on a few sites about Resurge Supplement being FDA approved, that is not entirely true. The US FDA is not authorized to review dietary supplement products for safety and effectiveness before they are marketed. The manufacturers and distributors of dietary supplements are responsible for making sure their products are safe BEFORE they go to market.
Having said that, Resurge is manufactured in Utah, at an FDA accredited site licensed facility that does independent testing of all the ingredients for quality and potency before they bottle it. And then again another round of testing once the product is bottled before it gets sent out to fulfillment centre.