Verified Supplement Data

Third-Party Tested Greens Powders

Buy Gnarly Performance Greens: it is on NSF/ANSI 173, which sets lead limits, and on NSF Certified for Sport, the same two lists as AG1. It costs $1.82 a serving; AG1 costs $3.33. 4 of the 9 greens powders we checked are on NSF/ANSI 173.

By Erin Rose Updated October 31, 2026 How we score

Our recommendation

Buy Gnarly Performance Greens

Its label prints an amount for every ingredient, with no blends. NSF/ANSI 173 checks that the tub holds what the label says and that lead and other heavy metals stay under set limits.

Buy on Amazon · $54.55
  • Want the lowest cost on both NSF lists? BPN Strong Greens is $1.50 a serving. It has one blend of 2,500 mg with no amounts inside it. We picked Gnarly because it prints every ingredient amount.
  • Want AG1? AG1 is on the same two lists, at $3.33 a serving.

Greens powders on NSF/ANSI 173 (4)

NSF checks each of these for contaminants and lists it by name. Tap a badge to see the listing.

  1. Our pick

    Gnarly Performance Greens

    NSF/ANSI 173NSF Certified for Sport

    10 g scoop · every ingredient amount printed. AG1 costs 1.8 times as much a serving. The listed pack is the 330 g Blueberry Acai bag we link.

    $1.82 a serving

    Buy on Amazon · $54.55

  2. Lowest cost on both NSF lists

    BPN Strong Greens

    NSF/ANSI 173NSF Certified for SportInformed Sport

    7.6 g scoop · 1 blend, not every amount printed. Costs less than Gnarly, with one blend of 2,500 mg.

    $1.50 a serving

    Buy on Amazon · $44.99

  3. Same two lists, higher cost

    AG1

    NSF/ANSI 173NSF Certified for SportInformed Choice

    12 g scoop · 4 blends, not every amount printed. The 360 g pouch we link is on the NSF lists.

    $3.33 a serving

    Buy on Amazon · $99.99

  4. Designs for Sport Pro Greens + Reds

    NSF/ANSI 173NSF Certified for Sport

    10 g scoop · 5 blends, not every amount printed. Costs more than Gnarly and BPN.

    $2.33 a serving

    Buy on Amazon · $69.99

Costs are the Amazon one-time price divided by the servings in the tub, read November 6, 2026. Listings were read October 1, 2026. We count a listing only when it names the same product and pack.

NSF/ANSI 173 also lists Thorne Daily Greens Plus, Nutrilite Organics Green Superfood (Amway), up&up Greens & Superfoods Powder (Target) and LTH Life Greens. We do not link those. NSF list read from its August 25, 2026 snapshot.

What the lead record looks like for greens powders

Lead has turned up in greens powders before. ConsumerLab tested greens and whole-food powders in 2019 and found lead in one. It did not name the product or give an amount. AG1 was not in that test.

From July to September 2026, a California group, the Center for Consumer Safety, filed at least 11 Prop 65 notices over lead in greens powders sold on Amazon. AG1’s refill pouch is one of them (notice 2026-04317, September 8, 2026). A notice says a warning is missing. It is a legal claim, not a lab result, and it gives no lead amount.

NSF/ANSI 173 is the list that sets a lead limit for each product. The sport lists below check for banned substances, not lead. NSF does not print the lead number for each listing, so a listing means the product met the limits.

On a sport list only (1)

This list tests for banned substances. It is not a lead test.

  1. Sports Research Organic Greens

    Informed Sport

    10 g scoop · 4 blends, not every amount printed. Checked for banned substances, not for lead.

    $1.50 a serving

    Check price

Not on any testing list (4)

We did not find these 4 on NSF/ANSI 173, NSF Certified for Sport, Informed Sport or Informed Choice. That does not mean they are bad, only that no public list checks them.

  1. Bloom Greens & Superfoods

    Not on a public list

    about 5 g scoop · 7 blends, not every amount printed. Bloom’s Amazon page and its own site make no testing claim.

    $1.17 a serving

    Check price

  2. Amazing Grass Green Superfood

    Not on a public list

    8 g scoop · 3 blends, not every amount printed. Carries an organic certificate, which is not a testing list. The lowest cost here.

    $0.75 a serving

    Check price

  3. Garden of Life Raw Perfect Food Green

    Not on a public list

    6.9 g scoop · 4 blends, not every amount printed. Carries a gluten-free certificate, which is not a testing list.

    $1.14 a serving

    Check price

  4. Green Vibrance

    Not on a public list

    11.2 g scoop · every ingredient amount printed. No testing claim on the Amazon page.

    $1.65 a serving

    Check price

What does each list check?

What each list means for a greens powder, in our words.
ListWhat it tells you
NSF/ANSI 173Checks that what the label says is in the tub, and that lead, mercury, arsenic and cadmium stay under set limits. It does not screen for banned substances.
NSF Certified for SportChecks the label and tests each certified lot for banned substances. It is the program athletes use.
Informed SportTests every batch for banned substances before it is sold.
Informed ChoiceBuys samples from stores at least monthly and tests them for banned substances.

How to check your own tub

  1. Search NSF’s dietary supplement list for the exact product name and scoop size.
  2. If it is on NSF Certified for Sport, match the lot number on your tub to the lots in the listing.
  3. Skip a label that only says “third-party tested” with no list or lab named.
  4. Prefer a label that prints an amount for every ingredient, so you can see what you are paying for.

Comparing on more than testing? See the AG1 alternatives table.

This page compares products. It is not medical advice.

Questions

Which greens powders are tested for heavy metals?

Gnarly Performance Greens, BPN Strong Greens, AG1 and Designs for Sport Pro Greens + Reds are on NSF/ANSI 173, the program that sets limits for lead, mercury, arsenic and cadmium. The list does not print the lead number for each product, so a listing means the product met the limits.

Is AG1 third-party tested?

Yes. The 360 g AG1 pouch is on NSF/ANSI 173 and NSF Certified for Sport, and Informed Choice lists the AG1 line. A California group filed a Prop 65 lead notice about AG1’s refill pouch in September 2026. That is a legal claim, not a lab result.

Is Gnarly Performance Greens worth it?

Yes, if you want AG1’s testing at a lower price. It also prints an amount for every ingredient, and AG1 uses blends.

Sources

  1. California Attorney General. Prop 65 60-day notice 2026-04317, “Lead in greens powder,” Center for Consumer Safety, September 8, 2026. oag.ca.gov. Ten more greens notices dated July 23 to September 8, 2026, from the same list.
  2. ConsumerLab. Contamination found in some greens and whole food powders. January 31, 2019. consumerlab.com
  3. NSF Certified for Sport listing, Gnarly Performance Greens Blueberry Acai, 330 g, read October 31, 2026. nsfsport.com
  4. NSF Certified for Sport, Informed Sport and Informed Choice: each program’s own list, searched by product name, October 1, 2026. NSF/ANSI 173: the list as of its August 25, 2026 snapshot; Gnarly Performance Greens rechecked on NSF’s site October 31, 2026.