I noticed that some ingredients in my multivitamin have no daily value established. A few concern me, specifically Boron (150 mcg per tablet), Nickel (5 mcg per tablet), and Tin (10 mcg per tablet). Should I be concerned about these ingredients?
It may seem surprising to see ingredients like boron, nickel and tin on a supplement label. However, boron and nickel are found in many foods, and tin is sometimes used as an inactive ingredient in tablets. The small amounts found in your multivitamin
do not pose a concern -- at the same time it's not clear if they offer any significant benefit. For more about boron, nickel, and tin see the full answer >>
Also see ConsumerLab.com's Review of Multivitamin and Multimineral Supplements >>
(You can check the recommended intakes and upper limits for other vitamins and mineral here