Greens powders · Screened for heavy metals, hidden doses & fillers
One of the biggest brands is being sued over lead, and a top seller was pulled off shelves in January after a Salmonella outbreak. I sorted {count} greens powders by which ones publish real lab results for lead, cadmium, and arsenic, and which ones hide the doses behind a 'proprietary blend.' The most expensive tub is not the cleanest.
By Renée Torres, R3 Research Lead·Updated Jul 2026
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7 of 7 products
| Product | Published Finished-Product Heavy-Metal Testing / COA | Per-Ingredient Dosing Transparency | Score | Price | Actions |
|---|---|---|---|---|---|
| Unlock safety data | 7.1 | $39.99 | |||
| Unlock safety data | 5.4 | $99 | |||
| Unlock safety data | 5.2 | $39.99 | |||
| Unlock safety data | 3.5 | $29.95 | |||
| Unlock safety data | 3.3 | $32.58 |
Not all 7 greens powder cleared our safety screen.
See which ones we flagged, which failed, and which ranked #1.
See which of these 7 products actually passed our safety screen
Free account unlocks full safety test results, complete spec breakdowns, and what disqualified the ones that didn't make the list.
R3 Heavy-Metal Testing Audit
What separates greens powders is not the ingredient list, it is whether the brand publishes finished-product lab results for lead, cadmium, and arsenic. Most only claim they test, and organic greens have tested about three times higher for lead, so the organic seal certifies the farm, not the powder in the tub.
Publishes heavy-metal results: Transparent Labs Prebiotic Greens, Ora Organic Easy Being Green Greens Powder. You can see real third-party lead, cadmium, and arsenic numbers for the powder, not just a claim.
Says "third-party tested," shows nothing: AG1 (Athletic Greens) AG1 Athletic Greens (tested, not shown); Nested Naturals Super Greens (tested, not shown); ; . The label markets testing, and sometimes a sport or organic seal, but no lead, cadmium, or arsenic result is published for you to check.
Renée's Take · Jul 2026
If you added a greens powder to your cart to eat more vegetables without cooking them, the two things you actually want to know are whether it is safe and whether it does anything for the price. It turns out those are the same question. Greens powders are their own problem because they are dried, concentrated leaves and algae, and the process that concentrates the nutrients also concentrates whatever lead, cadmium, and arsenic the plants pulled from the soil. The Clean Label Project reported that roughly 47% of the supplements it tested exceeded a California Prop 65 metal limit, and organic greens tested about three times higher for lead, because the organic seal certifies the farm, not the metal in the finished tub.
So the one thing that truly separates these powders is whether the brand publishes finished-product lab results, a per-batch Certificate of Analysis you can actually read, instead of a we-test-everything line with no numbers. Most brands only claim they test. Two current headlines make the point: AG1 is facing a 2026 Prop 65 lead class action, and Live It Up Super Greens was pulled in January 2026 after an FDA Salmonella recall linked to 119 illnesses.
My scoring system weights published heavy metals testing highest, gives credit only for registry-verified certifications like NSF or Informed, penalizes proprietary blends that hide the dose of every ingredient, and gives organic zero safety credit. The result is not the ranking the price tags predict. Transparent Labs Prebiotic Greens leads at 8.3 because it publishes third-party purity numbers, fully doses every ingredient, and is Informed certified. AG1 and Ora Organic Easy Being Green follow at 5.4 and 5.2, each strong on one axis but hiding doses in a blend. The cheapest and the cleanest-looking organic tubs, including Amazing Grass Green Superfood at 2.6, land at the bottom because they publish nothing you can check.
The criteria R3 evaluates for every greens powder
Active Recall / Microbial Safety, Published Finished-Product Heavy-Metal Testing / COA, Independent Third-Party Certification
Per-Ingredient Dosing Transparency, Dietary Fiber per Serving, Added Sugar / Sweetener Profile
Safety factors I look at closely when rating greens powder
This is the concern that drives the whole category. Dried greens, spirulina, and chlorella concentrate the lead, cadmium, and arsenic the plants absorbed, and the Clean Label Project reported that roughly 47% of tested supplements exceeded a Prop 65 metal limit. A daily scoop means daily exposure, and there is no safe level of lead. The problem is not that metals exist, it is that most brands will not show you how much is in the tub.
Favor a brand that publishes finished-product results for lead, cadmium, and arsenic, like Transparent Labs Prebiotic Greens. Treat a we-test-everything claim with no numbers as unverified.
A Prop 65 warning means disclosed lead exposure above 0.5 micrograms a day, and it shows up on products you would assume are clean. now carries one and faces a 2026 lead class action, and carries one despite being USDA organic. Organic certifies the farming, not the metal in the finished powder.
The other 1 publish nothing about heavy-metal testing at all. See the Testing column in the ranking above for how each scored.
Read the warning as a disclosed exceedance to weigh for daily use, and do not treat an organic label as a substitute for an actual heavy-metal test.
A proprietary blend gives one combined weight for a group of ingredients, so you cannot tell if you are getting an effective dose or a sprinkle. It is the single biggest reason greens powders draw the waste-of-money critique: you are paying a premium and cannot verify what is inside. Six of the seven tubs I scored hide at least some doses this way, including AG1, Ora, Nested Naturals, Garden of Life, Bloom, and Amazing Grass.
Choose a powder that discloses a dose for every ingredient, like Transparent Labs Prebiotic Greens. Treat a blend as hidden information, not a trade secret worth paying for.
Heavy metals are the slow risk, but microbial contamination is the sudden one. In January 2026, Live It Up Super Greens was pulled in an FDA Salmonella recall linked to 119 illnesses, and Member's Mark Super Greens was recalled in late 2025. Powders that blend dozens of raw plant inputs have real contamination surface, and a brand's recall history tells you how it handles that risk.
Check for any active recall before you buy, and prefer brands that publish microbial testing alongside their heavy-metal results rather than only after an outbreak.
Greens powders increasingly add adaptogens like ashwagandha and rhodiola, which are frequently advised against during pregnancy and nursing, and they are often hidden inside a blend where you will not spot them. AG1, Ora Organic Easy Being Green, and Bloom Nutrition Greens & Superfoods each contain a contraindicated adaptogen in my ranking.
If you are pregnant or breastfeeding, read the full ingredient list for ashwagandha and rhodiola, and talk to your provider before adding any greens powder.
Every product in our ranking is evaluated against these criteria. See how scores are calculated.
6 things I check before recommending
The smart order is to clear the safety questions first, then decide whether you are getting a real, fully dosed product for the price. Work through these in sequence, because a tub can look clean and organic and still hide both its lead and its doses.
Look for published heavy-metal results, not a testing claim
Start with what a lab actually found, not what the tub says. Because dried greens and algae concentrate metals, the strongest signal is a brand that publishes finished-product results for lead, cadmium, and arsenic, ideally a per-batch Certificate of Analysis you can look up. A third-party tested line with no numbers is a claim, not proof. In my ranking, Transparent Labs Prebiotic Greens and Ora Organic Easy Being Green publish third-party purity numbers, while most of the field only says it tests.
Check for a registry-verified certification
An independent certification is real only if you can find it on the certifier's public registry, not just a seal printed on the box. NSF Certified for Sport, USP Verified, and Informed Sport or Informed Choice all list certified products on searchable databases. I credited Transparent Labs Prebiotic Greens for an Informed listing and AG1 for an NSF Certified for Sport listing, both confirmed on the registry. A brand that just says lab tested with nothing to verify gets no credit here.
Reject the proprietary blend
A proprietary blend lists a group of ingredients and one combined weight, so you cannot tell whether you are getting a clinically useful dose of anything or a pinch of it for label decoration. It is also where a brand can bury a cheap filler behind an impressive-sounding name. Only Transparent Labs Prebiotic Greens disclosed a dose for every ingredient in my set. AG1, Ora, Nested Naturals, Garden of Life, Bloom, and Amazing Grass all hide at least some doses inside named blends.
Read the Prop 65 warning honestly
A California Prop 65 lead warning means the product can expose you to more than 0.5 micrograms of lead a day. It is not automatic proof a powder is dangerous, but it is a disclosed exceedance you should weigh, especially for daily use. Note the paradox: Garden of Life Raw Organic Perfect Food is USDA organic and still carries a lead warning. Absence of a warning is not proof of cleanliness either, since a brand that never tests may simply not know.
Scan for adaptogens if you are pregnant or nursing
Many greens powders now fold in adaptogens like ashwagandha and rhodiola, which are marketed for stress but are commonly advised against in pregnancy and breastfeeding. Because these are often tucked inside a proprietary blend, you may not see them without reading the full ingredient list. AG1, Ora Organic Easy Being Green, and Bloom Nutrition Greens & Superfoods all contain a contraindicated adaptogen. If you are expecting or nursing, that alone can rule a tub out, so check with your provider first.
Weigh the price against what you can verify
Greens powders run from about $0.34 to over $3 a serving, and price tracks marketing more than purity. The most expensive tub in my set, AG1 at roughly $3.30 a serving, hides its doses in a blend, while a $1.33 serving from Transparent Labs shows you every dose and its purity numbers. Decide what you are paying for. If a brand cannot show you its testing or its full doses, you are paying a premium for a claim, not for proof.
Real questions families ask about greens powder — answered with the data behind every score.