PlainVitamins

Spirulina

by ZHOU · tablet or pill · 180 tablets

  • On the market (NIH)
  • UPC 8 59805 00633 1
  • DSLD label 250138
  • Serving 6 tablets (3 g)
  • 30 servings

Spirulina by ZHOU lists 6 ingredients, 6 with an amount per serving of 6 tablets, such as 3 g of california grown spirulina, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on May 22, 2021.

What is in Spirulina?

Each row as the label prints it, per serving of 6 tablets. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Spirulina: Supplement Facts rows against the market (DSLD label 250138, January 2026 release)
IngredientAmount% DVAmong products listing it
Protein2 g4%Protein in Spirulina against 8,985 products2 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.2 g

70% of 8,985 products listing protein give more (median 16 g).

California grown Spirulina3 gBlue-Green Algae in Spirulina against 709 products3,000 mg per serving; the middle half of products list 100 mg to 1,000 mg, the median 500 mg.3,000 mg

Higher than 91% of 709 products listing blue-green algae (median 500 mg).

C-Phycocyanin185 mg
Chlorophyll30 mgChlorophyll in Spirulina against 394 products30 mg per serving; the middle half of products list 7.5 mg to 42.75 mg, the median 16 mg.30 mg

Higher than 61% of 394 products listing chlorophyll (median 16 mg).

Gamma-Linolenic Acid30 mgGamma Linolenic Acid in Spirulina against 740 products30 mg per serving; the middle half of products list 42 mg to 160 mg, the median 90 mg.30 mg

81% of 740 products listing gamma linolenic acid give more (median 90 mg).

Total Carotenoids11 mgCarotenoids in Spirulina against 261 products11 mg per serving; the middle half of products list 0.5 mg to 10 mg, the median 4 mg.11 mg

Higher than 75% of 261 products listing carotenoids (median 4 mg).

Zeaxanthin2.9 mgZeaxanthin in Spirulina against 1,215 products2.9 mg per serving; the middle half of products list 0.4 mg to 2 mg, the median 1 mg.2.9 mg

Higher than 78% of 1,215 products listing zeaxanthin (median 1 mg).

Source: NIH ODS Dietary Supplement Label Database, label 250138 (entered May 22, 2021), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 3,000 mg of california grown spirulina (filed by NIH under blue-green algae) is higher than 91% of the 709 blue-green algae products that print an amount; 18 list more.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

The products whose ingredient lists overlap most with Spirulina's, rare ingredients counting for more.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
Suggested Use: Supplement a healthy diet with 6 spirulina tablets (1 serving) per day.
Warnings
Caution: Do not exceed recommended dose.
Pregnant or nursing mothers, children under 18 and individuals with a known medical condition should consult a physician before using this or any dietary supplement.
Keep out of reach of children.
Do not use if safety seal is damaged or missing.
Allergens and what it does not contain
Pesticides & herbicides free Made with Non-GMO ingredients
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 250138.

What else is on the label?

Other ingredients: Cellulose, Vegetable Magnesium Stearate, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Good Manufacturing Practice Consistent quality Pesticides & herbicides free Made with Non-GMO ingredients.

How many labels does Spirulina have?

6 labels are on file under this name since March 24, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 250138 (current) Entered May 22, 2021 · on the market · 180 tablets · UPC 8 59805 00633 1
  2. Label 250129 Entered May 22, 2021 · on the market · 6 ounces · UPC 8 59805 00632 4
  3. Label 200084 Entered February 25, 2019 · off the market April 23, 2021 · 180 tablets · UPC 8 59805 00633 1
  4. Label 199988 Entered February 25, 2019 · off the market April 23, 2021 · 6 ozs · UPC 8 59805 00632 4
  5. Label 71368 Entered March 24, 2017 · on the market · 180 tablets · UPC X0013B94N5
  6. Label 71367 Entered March 24, 2017 · on the market · 6 oz. · UPC X00103J2I3

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

Who makes it?

The label names ZHOU Nutrition Zhou, Inc. (distributor), Park City, UT. All ZHOU products.

Where next?