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Four of six best-selling creatine gummies failed ISO-accredited lab testing; one top-rated product delivered about 0.005 g against a labeled 5 g. The four failing products sold roughly 50,000 units in a single month.

NOW Foods tested 12 creatine gummy brands by HPLC. Five contained little to no creatine, and several showed significant creatinine — the inert breakdown product — indicating the creatine degraded in the gummy format.

Liquid and effervescent creatine products repeatedly failed where powders passed. One "100% stable, pure creatine" liquid contained virtually none; another had creatinine at 7% of creatine content vs. a 0.1% acceptable level.

Highest lead level in Consumer Reports' 2025 investigation — more than 15× CR's daily level of concern (0.5 µg). CR recommended avoiding the product. Earlier ConsumerLab testing also found protein content below label.

Second-highest lead level in Consumer Reports' 2025 testing of 23 protein products — roughly 12× CR's daily level of concern. CR placed it in its "avoid" category.

Tested at 143% of Consumer Reports' daily level of concern for lead per serving. CR advised limiting to occasional use rather than daily.

Plant-based pea/rice blend found to exceed safe daily lead thresholds. Across CR's testing, plant-based powders averaged 9× the lead of dairy-based products.

Multiple independent tests flagged elevated heavy metals. Garden of Life products have been named in class litigation over undisclosed contaminant levels.

Lead and arsenic detected above recommended daily exposure for regular use; rice-protein formulations showed particularly elevated arsenic.

22 of 25 brands were inaccurately labeled; actual content ranged from 74% to 347% of the label, and only three were within ±10%. One contained no melatonin but 31.3 mg of CBD. Products marketed to children were included.

Grocery-store vitamin D from 12 manufacturers ranged from 9% to 140% of labeled dose (JAMA Internal Medicine). ConsumerLab found 29% of products failed: a children's gummy at 251% of label, an adult gummy at 32%, a liquid at 44%; two combination products contained lead.

Across ConsumerLab's multivitamin reviews, 30% to 52% of products failed for lead contamination, inability to disintegrate, or ingredient amounts significantly off label. Gummies were the most likely form to fail. Centrum Silver showed potency variance on several vitamins.

Only one CoQ10 brand tested met its label; the rest contained 30% or less of the claimed amount. Three of four brands using "Coenzyme Q-10 (yielding 6% Ubiquinone-10)" phrasing failed potency testing.

Only three of 23 quercetin brands met label claim for potency. One repeat violator labeled "500 mg Quercetin Dihydrate (20% potency)" tested at 4% of claim.

12 of 16 met total-magnesium claims, but almost all failed when tested for the chelated glycinate form — consistent with blending glycine and cheap magnesium oxide and labeling it "glycinate." One brand claimed "750 mg" by compound weight rather than elemental dose.

ConsumerLab flagged meaningful potential for lead accumulation per serving given the multi-ingredient plant composition and recommended daily use.

Flagged for both elevated lead and failed dissolution testing — ingredients may not be absorbed even where present at stated amounts.

Multiple products contained significantly less curcuminoid content than stated — some under 50% of the claim.

Products claiming standardized extracts (e.g., KSM-66) contained significantly less than labeled withanolides — the compounds responsible for the claimed benefits.

Highest heavy-metal contamination rates of any supplement category in FDA enforcement data; many products carry California Prop 65 warnings for lead and mercury.

ConsumerLab flagged heavy-metal concerns. Even low-level prenatal lead exposure is associated with fetal neurological harm, low birth weight, and developmental delay.

The "whole food" sourcing used in this line has been associated with elevated heavy-metal levels — especially concerning in a prenatal product.

Several collagen powders did not contain the labeled amount of peptides or failed nitrogen testing used to verify protein content.

One of the most consistently problematic categories — multiple products found with dramatically less glucosamine or chondroitin than labeled, sometimes under 10% of the claim.