Verified
“Organic spirulina powder.”
USDA Organic seal on the panel.
BulkSupplements Organic Spirulina Powder, 500 g Review
SAC StudioBest BudgetCONSIDER
8.1/10SAC Product Score™
How the score breaks downHide breakdown
SAC Product Score™ — how it breaks down
- Dose vs Clinical Range25%9.2
- Purity & Contaminant Control25%7.8
- Label Transparency20%6.6
- Certifications & Sourcing15%7.6
- Value15%9.4
The budget organic powder without the lead warning
✓ Buy if…
- You want a cheap organic 3 g dose without a printed heavy-metal warning
- You buy in bulk and want 167 servings in one bag
✗ Skip if…
- You want protein, iron or phycocyanin on the panel
- You want a named growing region
Read the full analysis
✓ Also buy if…
- You want a single ingredient and nothing else
✗ Also skip if…
- You prefer tablets
BulkSupplements does what the name says: 500 g of USDA Organic spirulina powder in a resealable bag, 1 teaspoon (about 3 g) per serving, 167 servings, no other ingredients and no allergens. The front lists gluten-free, soy-free, dairy-free, no added sugar and additive-free. What the panel does not do is disclose protein, iron or phycocyanin, and the pack carries no third-party testing statement.
How we built the SAC Product Score™ — 8.1/10
Dose vs Clinical Range25%9.2/10
One teaspoon (about 3 g) is the studied daily amount; 167 teaspoons per bag.
Purity & Contaminant Control25%7.8/10
USDA Organic and no Prop 65 warning, but no third-party testing statement is printed and the growing region is not named.
Label Transparency20%6.6/10
The panel declares only 3 g organic spirulina powder per serving; protein, minerals and pigments are not disclosed.
Certifications & Sourcing15%7.6/10
USDA Organic seal plus gluten-free, soy-free, dairy-free and additive-free statements on the front.
Value15%9.4/10
About $0.15 per 3 g serving; the second-cheapest dose on the list and the cheapest without a warning.
The product at a glance
- Form
- Powder
- Serving
- 1 teaspoon (about 3 g)
- Count
- 500 g, 167 servings
- Disclosed per serving
- 3 g organic spirulina powder
- Other ingredients
- None; allergens: none
- Seals
- USDA Organic; gluten free, soy free, dairy free, no added sugar, additive free
- Cost per dose
- ~$0.15 per 3 g serving
Marketing claims vs. reality
Verified
“Additive free, no added sugar.”
The panel lists a single ingredient and 'Other ingredients: None'.
Verified
“167 servings.”
500 g at about 3 g per teaspoon is 167 servings, as printed on the front.
What our test actually found
01A clean bag with a quiet panel
Everything on the label is either the algae or an absence: no additives, no allergens, no warning. That is good. What is missing is any positive disclosure, so you cannot count the iron or the protein toward anything.
02The safer budget choice
The choice at the bottom of the price range is BulkSupplements at fifteen cents or Micro Ingredients at thirteen with a Prop 65 warning. Two cents a day buys you a label without a lead warning; that is an easy call.
Pros & cons, no sugar-coating
Pros
- About $0.15 per 3 g dose
- USDA Organic, single ingredient, no allergens
- No Prop 65 warning
- 167 servings per bag
Cons
- No protein, iron or phycocyanin disclosure
- No third-party testing statement on the pack
- Growing region not named
Buy it when price decides and you still want organic without a warning
This is the sensible floor of the market: a real organic seal, a full 3 g teaspoon and a clean panel for fifteen cents. It cannot compete with the tablets on disclosure or origin, and it does not try.
Affiliate link — Super Achiever Club earns a small commission at no extra cost to you.
If this doesn’t fit — try these
Nutrex Hawaii Pure Hawaiian Spirulina
8.8/10Hawaiian-pond spirulina that hits the full 3 g trial dose in one six-tablet serving, declares its iron and protein, and carries the longest seal list on the list.
See it on the list →Earthrise California Spirulina
8.6/10The only product here that prints its c-phycocyanin content, 165 mg per 3 g serving, from a single California farm; you pay for that transparency with the highest cost per dose on the list.
See it on the list →Anthony's California Spirulina Powder
8.5/10A California-grown powder with a full food-style Nutrition Facts panel, 3 g per teaspoon, batch-tested gluten-free, at about a quarter per dose.
See it on the list →Sources & further reading
- Huang H, Liao D, Pu R, Cui Y. Diabetes Metab Syndr Obes. 2018;11:729-742.Huang H, Liao D, Pu R, Cui Y · 2018 · Diabetes, Metabolic Syndrome and Obesity · PMID 30532573
Quantifying the effects of spirulina supplementation on plasma lipid and glucose concentrations, body weight, and blood pressure
A meta-analysis of randomized trials found spirulina reduced total cholesterol, LDL, triglycerides, fasting glucose and diastolic blood pressure, with the largest lipid effects at higher doses and longer durations.
- Roy-Lachapelle A, Solliec M, Bouchard MF, Sauvé S. Toxins (Basel). 2017;9(3):76.Roy-Lachapelle A, Solliec M, Bouchard MF, Sauvé S · 2017 · Toxins · 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.