PlainVitamins

Spirulina 500 mg

by Herbal Secrets · tablet or pill · 500 tablets

  • Off the market since May 2025 (NIH)
  • UPC 8 19209 02059 3
  • DSLD label 282890
  • Serving 4 tablets
  • 125 servings

Spirulina 500 mg by Herbal Secrets lists 6 ingredients, 6 with an amount per serving of 4 tablets, such as 2 g of spirulina, powder, beside 2 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on January 23, 2023.

What is in Spirulina 500 mg?

Each row as the label prints it, per serving of 4 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 500 mg: Supplement Facts rows against the market (DSLD label 282890, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories10 Calories
Sodium10 mg1%Sodium in Spirulina 500 mg against 14,514 products10 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.10 mg

78% of 14,514 products listing sodium give more (median 55 mg).

Protein1 g2%Protein in Spirulina 500 mg against 8,985 products1 g per serving; the middle half of products list 2 g to 24 g, the median 16 g.1 g

77% of 8,985 products listing protein give more (median 16 g).

Spirulina, Powdercertified organic, providing2 gBlue-Green Algae in Spirulina 500 mg against 709 products2,000 mg per serving; the middle half of products list 100 mg to 1,000 mg, the median 500 mg.2,000 mg

Higher than 88% of 709 products listing blue-green algae (median 500 mg).

Vitamin Aas Beta-Carotene770 IU15%Vitamin A in Spirulina 500 mg against 5,772 products770 IU per serving; the middle half of products list 2,000 IU to 5,000 IU, the median 4,000 IU.770 IU

89% of 5,772 products listing vitamin A give more (median 4,000 IU).

Phycocyanin300 mgPhycocyanin in Spirulina 500 mg against 40 products300 mg per serving; the middle half of products list 123.75 mg to 300 mg, the median 225 mg.300 mg

Higher than 68% of 40 products listing phycocyanin (median 225 mg).

Gamma-Linolenic Acid13 mgGamma Linolenic Acid in Spirulina 500 mg against 740 products13 mg per serving; the middle half of products list 42 mg to 160 mg, the median 90 mg.13 mg

92% of 740 products listing gamma linolenic acid give more (median 90 mg).

Chlorophyll22 mgChlorophyll in Spirulina 500 mg against 394 products22 mg per serving; the middle half of products list 7.5 mg to 42.75 mg, the median 16 mg.22 mg

Higher than 58% of 394 products listing chlorophyll (median 16 mg).

Total Carotenoids7 mgCarotenoids in Spirulina 500 mg against 261 products7 mg per serving; the middle half of products list 0.5 mg to 10 mg, the median 4 mg.7 mg

Higher than 70% of 261 products listing carotenoids (median 4 mg).

Source: NIH ODS Dietary Supplement Label Database, label 282890 (entered January 23, 2023), version 9.4.0. See the label on DSLD or its label image (PDF). 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:

  • 92% of the 740 products that print an amount of gamma linolenic acid list more than its 13 mg of gamma-linolenic acid (filed by NIH under gamma linolenic acid) (median 90 mg).

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 500 mg'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: As a dietary supplement, adults take four (4) tablets daily with or without a meal.
Warnings
Caution: If you are pregnant, nursing, taking any medication(s) or have any medical condition, consult your doctor before use.
Discontinue use and consult your doctor if any adverse reactions occur.
Keep out of reach of children.
Allergens and what it does not contain
Contains No: Preservatives, sugar, starch, milk, lactose, soy, gluten, wheat, yeast, or fish. Non GMO
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 282890.

What else is on the label?

Other ingredients: Spirulina.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Made in the USA; GMP Good Manufacturing Practice Quality Product.

How many labels does Spirulina 500 mg have?

One label is on file, entered on January 23, 2023.

  1. Label 282890 (current) Entered January 23, 2023 · off the market May 28, 2025 · 500 tablets · UPC 8 19209 02059 3

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

Who makes it?

The label names Herbal Secrets (distributor), Jersey City, NJ. All Herbal Secrets products.

Where next?