MaryRuth Organics does use third-party testing, but the scope and rigor depend on which standard you’re comparing it to. The brand works with the Clean Label Project for certification on many of its products and tests for heavy metals using California’s Proposition 65 as its benchmark. However, MaryRuth’s does not carry NSF International or USP verification seals, which are widely considered the gold standards for supplement testing.
What Testing MaryRuth’s Actually Does
MaryRuth’s states that it uses Prop 65 parameters for heavy metal testing. Prop 65 is a California law that sets thresholds for exposure to certain chemicals, including lead, cadmium, arsenic, and mercury. The company also complies with California Assembly Bill 899, which requires brands selling children’s dietary supplements in the state to test for those four heavy metals and publicly disclose the results. Notably, AB 899 doesn’t set limits on how much of these metals a product can contain. It only requires transparency.
MaryRuth’s has posted results for more than 350 lots across more than 40 products on its website, though the formatting has been noted as difficult to navigate. An analysis by Unleaded Kids found that the highest lead level among those disclosed results was 68 parts per billion in a multivitamin with iron and 33 ppb in a probiotic. For context, there’s no universal “safe” threshold for lead in supplements, but these numbers give you a concrete sense of what’s in the products.
Clean Label Project Certification
Several MaryRuth’s products carry the Clean Label Project Purity Award. Certified products span a wide range, including Women’s Menopause Gummies, Multivitamin + Hair Growth Gummies, Liquid Nighttime Multimineral, various organic liquid drops, and liposomal supplements. The Clean Label Project tests for contaminants like heavy metals, pesticides, and plasticizers, then awards certifications to products that meet its standards.
Clean Label Project is a legitimate nonprofit, but it’s not equivalent to USP or NSF verification. Its testing methodology and thresholds are proprietary, meaning you can’t easily compare its standards against a public benchmark. It’s better than no third-party involvement, but it doesn’t carry the same weight in the supplement industry as the more established verification programs.
No USP or NSF Verification
MaryRuth’s is not a participant in either the USP Dietary Supplement Verification Program or NSF International’s supplement certification. These two programs are the most respected in the industry because they verify not just what’s in the bottle, but also whether the product was manufactured under strict quality controls, whether it dissolves properly, and whether it actually contains what the label claims. Brands like Nature Made (USP) and Garden of Life (NSF) carry these seals on many of their products.
The absence of USP or NSF certification doesn’t mean MaryRuth’s products are unsafe or ineffective. But if third-party verification is a top priority for you, this is a meaningful gap. These programs involve regular facility audits, batch testing, and public accountability that go well beyond what Clean Label Project or Prop 65 compliance requires.
MaryRuth’s Recall History
In one notable incident, MaryRuth’s voluntarily recalled two lots of its Liquid Probiotic for Infants due to potential contamination with Pseudomonas aeruginosa, a type of bacteria. The recall was limited to two specific lot numbers of the 1-ounce product. The company said it discovered the issue through its own routine laboratory testing with a manufacturing partner, which led to the precautionary recall. The FDA documented this as a voluntary action, not an enforcement action, which generally reflects well on a company’s internal quality processes.
How This Compares to the Industry
The supplement industry in the United States is largely self-regulated. The FDA does not approve supplements before they hit the market, and brands are responsible for ensuring their own products are safe and accurately labeled. In that environment, MaryRuth’s sits in the middle of the pack. The brand does more than the bare minimum: it discloses heavy metal test results, works with the Clean Label Project, and uses Prop 65 thresholds as a baseline. But it falls short of the top tier occupied by brands that invest in USP or NSF verification.
If you’re choosing supplements for yourself or your family and want the highest level of independent verification, look for the USP Verified or NSF Certified for Sport marks on the label. If you’re comfortable with a moderate level of third-party oversight and value MaryRuth’s specific product formulations, the brand’s current testing practices provide some transparency, particularly for heavy metals. Just know that “third-party tested” is a spectrum, not a binary, and MaryRuth’s lands closer to the middle than the top.