Nutricost Boron 5mg supplement contains 5mg of high quality boron per capsule. They are vegetarian friendly, GMO free and gluten free. Nutricost, located and headquartered in the USA, only uses the best ingredients for maximum quality and to help you feel your best! By keeping our supplement recipes simple and clean, you get the best experience possible with Nutricost. Our supplements are manufactured in a GMP-compliant and FDA-registered facility; and each batch of every product is tested by independent, ISO-accredited laboratories.