Micro Ingredients Organic Spirulina Powder, 1 lb Review
#6 of 8 · Best Value Organic Powder✓ Label verified · Supplement Facts read Sep 20, 2026Real retailer photo, cut out. Label unedited.
Consider it. The value pick, with a lead warning you should read before buying. On dose, disclosure and price this is the best organic powder on the list.
$19-21~$0.13 per 1-scoop (3 g) serving
Why It Scores 8.2 — And The Label Line Behind Each Number
Dose vs Clinical Range
25% of scoreOne scoop is about 3 g, the studied daily amount; 151 scoops per pound.
- Disclosed per serving
- 3 g organic spirulina, 2 g protein, about 40 mg chlorophyll
Purity & Contaminant Control
25% of scoreThe pack claims cGMP and third-party lab testing, but the same panel prints a California Prop 65 lead warning, the only one on this list.
- Seals
- USDA Organic, cGMP, GMO free, third party lab tested
Label Transparency
20% of scoreThe panel declares 3 g organic spirulina, 2 g protein and about 40 mg naturally occurring chlorophyll per scoop, with no other ingredients.
Certifications & Sourcing
15% of scoreUSDA Organic (Organic Certifiers), cGMP and GMO-free marks on the pack; growing region not named.
- Form
- Powder
- Other ingredients
- None
Value
15% of scoreAbout $0.13 per 3 g serving, the lowest cost per dose in the group.
- Serving
- 1 scoop (about 3 g)
- Count
- 1 lb, 151 servings
- Cost per dose
- ~$0.13 per 3 g serving
- More Specs
- Warning
- California Prop 65 lead warning printed on the label
Label verified. Every figure read from the Supplement Facts photo, Sep 20, 2026.
Marketing Claims Vs. Reality
USDA Organic.
USDA Organic seal on the panel, certified by Organic Certifiers.
Third party lab tested.
The pack states third-party lab testing, yet the same label carries a Prop 65 lead warning; testing is claimed, but the result it implies is not a clean one.
Rich in vegan protein.
2 g protein per 3 g scoop is declared, which is a high protein fraction for a plant but a small absolute amount.
What Our Test Actually Found
The Prop 65 warning is the story
California requires the warning when lead exposure at the label serving may exceed 0.5 micrograms a day. Spirulina takes up metals from its water, so a printed warning is a direct comment on the growing environment. None of the US-grown products on this list carry one.
Everything else is excellent for the money
Full 3 g scoop, chlorophyll and protein disclosed, organic certification, cGMP, a pound for around $20. If the warning does not bother you, nothing here is cheaper per gram.
Full analysis: all pros & cons (7), buy if / skip if
- Lowest cost per 3 g dose on the list
- USDA Organic, cGMP and third-party-lab-tested marks
- Chlorophyll and protein declared
- 151 servings per bag
- California Prop 65 lead warning printed on the label
- Growing region not named
- Plain powder taste
- You want the cheapest organic 3 g dose available
- You want chlorophyll and protein disclosed on the panel
- You are comfortable with a Prop 65 warning on a plant product
- You want to avoid any printed heavy-metal warning
- You are pregnant or buying for children
- You want a named growing region
On dose, disclosure and price this is the best organic powder on the list. A Prop 65 warning does not mean the product is unsafe; it means a California threshold for lead may be exceeded at the label serving. For a seaweed-type product that is a meaningful signal about where it grew, and it is the reason Micro Ingredients sits behind the US-grown powders despite costing half as much.
Micro Ingredients packs 151 scoops of 3 g into a one-pound bag for around $20, making it the lowest cost per dose on this list. The panel declares 3 g organic spirulina, 2 g protein and about 40 mg naturally occurring chlorophyll, and the pack carries USDA Organic, cGMP, GMO-free and third-party-lab-tested marks. It also carries a California Prop 65 lead warning, which is why a product this cheap and this well-labelled does not rank higher.
Best value, docked for the warning on its own label
If price per dose is your ranking, this wins. Our ranking weights contaminant control at a quarter of the score, and a printed lead warning costs it the podium. Buy it knowingly, or pay a little more for Anthony's California powder without the warning.
If This Doesn’t Fit — Try These
01Nutrex Hawaiian Spirulina
It costs more than a bag of powder and it is not organic, but everything the science asks for is on the panel: 3 g per serving, a named controlled pond, third-party testing and disclosed iron and protein.
02Earthrise California Spirulina
If you take spirulina for its phycocyanin, Earthrise is the only brand that tells you how much you are getting.
03Anthony's California Spirulina
If you want to know where your algae grew and do not need an organic seal, this is the cheapest way to a disclosed, 3 g, US-grown dose.
Quick Answers
Does the Prop 65 warning mean the product is unsafe?
Not necessarily. It means exposure at the label serving may exceed California's 0.5 microgram-per-day lead threshold, which is far stricter than most standards. For a water-grown algae it is still a meaningful signal about sourcing, and it is why we rank US-grown powders above it.
How much is one serving?
One scoop, about 3 g. The bag holds 151 servings, which at one scoop a day is about five months.
Sources & Further Reading
2 peer-reviewed sources, each linked to PubMed
- [1] Roy-Lachapelle A, Solliec M, Bouchard MF, Sauvé S. Toxins (Basel). 2017;9(3):76. PMID 28245621 — Detection of Cyanotoxins in Algae Dietary Supplements. Analysis of eighteen algae dietary supplements detected cyanotoxins in a subset of products, underlining that cultivation control and finished-product testing, not the algae species alone, determine safety.
- [2] Serban MC, et al. Clin Nutr. 2016;35(4):842-51. PMID 26433766 — A systematic review and meta-analysis of the impact of Spirulina supplementation on plasma lipid concentrations. Pooling seven randomized trials, spirulina supplementation lowered total cholesterol, LDL and triglycerides and raised HDL, with doses across the trials ranging from about 1 to 8 g a day.
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