This post is in partnership with Hiya. I only endorse products I believe in.

If you’re giving your kids a daily vitamin, there’s one question most parents don’t think to ask:

What’s actually in it… beyond the label? Because here’s the sad truth: Even vitamins marketed “for kids” can contain trace amounts of heavy metals (*A).

And most parents have no idea how to check.

TLDR: I only use Hiya kids vitamins because of the brand’s strict safety standards. Get 50% off now with code NMM50

Why this started mattering to me

Parenting today comes with a running checklist that never ends. What our kids eat. What we put in our homes. What we give them daily.

And just when you feel like you’ve figured it out, you see another headline about recalls or safety concerns. Infant formula. Medications. Products that were supposed to be safe.

It’s unsettling. And it made me realize something clearly: “healthy” doesn’t always mean safe. So I started paying a lot more attention to the brands I trust, especially when it comes to something my kids are taking every single day.

How to check a kids vitamin for heavy metals

Most brands don’t make heavy metal testing details easy to find, and some don’t clearly explain how often they test, what they test for, or what safety standards they follow. If brands do disclose this information, it’s usually somewhere on their testing, quality, or FAQ pages.

These are the main things I now look for before buying any kids supplements:

• Third-party testing for heavy metals and contaminants
• Testing for heavy metals like lead, arsenic, cadmium, and mercury
• Batch-level testing (not occasional testing)
• Transparent test results or published safety standards
• Certifications like Clean Label Project or NSF
• Disclosure of testing methods like ICP-MS, one of the most trusted methods for detecting trace metals

Heavy metals are naturally found in our environment. They exist in soil, water, and air, which means they can make their way into food, vitamins, even packaging.

Because of that, it’s nearly impossible for anything to be completely free of them. What actually matters is how much is present, whether it’s being tested, and whether levels are kept well below safe limits.

And kids are more vulnerable to heavy metal exposure, even at lower levels. According to the CDC, lead exposure in children has been linked to (*B):

• Learning difficulties
• Focus and behavioral challenges
• Impacts on brain development

Which makes this feel less like a “nice to know” and more like something every parent should know.

Why I keep choosing Hiya

This is exactly why I keep coming back to Hiya. Not just because of what’s in their vitamins, but because of how seriously they take what could be in them.

Here’s what stood out to me:

• Third-party heavy metal testing: Every batch is tested multiple times throughout the supply chain for lead, arsenic, cadmium, mercury, and microbes.
• ICP-MS testing: One of the most trusted methods for detecting trace levels of heavy metals.
• Strict safety standards: Detectable levels are kept far below California Prop 65 limits, which are among the strictest heavy metal safety standards in the U.S.
• Clean Label Project Certified: Focused on product purity, ingredient safety, and contaminant testing.
• Medical-grade glass packaging: Glass bottles tested for contaminants like lead and cadmium.

That's the level of detail I want from a brand I'm trusting every day, and it tells me they’re thinking about safety the same way I am.

Plus, Hiya vitamins have zero sugar, no gummy junk, and actually taste great so my kids request them daily.

Hiya is the brand I actually trust

Hiya is one of the few brands where I don’t feel like I have to second-guess what’s behind the label.

✅ Transparent about ingredient safety and testing 

✅ Formulated specifically for kids

✅ Clean Label Project Certified

✅ Medical-grade glass bottles instead of plastic

✅ Zero added sugar

Get 50% off your first purchase with code NMM50

*A: https://nbscience.com/lead-in-childrens-multivitamins/

*B: https://www.cdc.gov/lead-prevention/symptoms-complications/

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