PlainVitamins

Spirulina

by Natural Smart Health · powder · 0.26 lbs

  • On the market (NIH)
  • DSLD label 318798
  • Serving 4 g (1 Scoop)
  • 30 servings

Spirulina by Natural Smart Health lists 12 ingredients, 12 with an amount per serving of 4 g, such as 547 mcg of vitamin A, 39 mcg of vitamin K, 0.1 mg of thiamine and 0.1 mg of riboflavin, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on September 25, 2024.

What is in Spirulina?

Each row as the label prints it, per serving of 4 g. 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 318798, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin A547 mcg61%
Vitamin K39 mcg32%Vitamin K in Spirulina against 4,607 products39 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg39 mcg

74% of 4,607 products listing vitamin K give more (median 80 mcg).

Thiamine0.1 mg11%Thiamin in Spirulina against 9,830 products0.1 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg0.1 mg

98% of 9,830 products listing thiamin give more (median 5 mg).

Riboflavin0.1 mg11%Riboflavin in Spirulina against 9,824 products0.1 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg0.1 mg

99% of 9,824 products listing riboflavin give more (median 4 mg).

Niacin1 mg7%Niacin in Spirulina against 12,413 products1 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg1 mg

98% of 12,413 products listing niacin give more (median 20 mg).

Vitamin B60.1 mg4%Vitamin B6 in Spirulina against 15,277 products0.1 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg0.1 mg

99% of 15,277 products listing vitamin B6 give more (median 6 mg).

Iron2 mg13%Iron in Spirulina against 6,910 products2 mg per serving; the middle half of products list 1.2 mg to 18 mg, the median 5 mg.DV 18 mgUL 45 mg2 mg

66% of 6,910 products listing iron give more (median 5 mg).

Phosphorus25 mg2%Phosphorus in Spirulina against 3,786 products25 mg per serving; the middle half of products list 45 mg to 200 mg, the median 90 mg.DV 1,250 mgUL 4,000 mg25 mg

86% of 3,786 products listing phosphorus give more (median 90 mg).

Iodine56 mcg37%Iodine in Spirulina against 6,382 products56 mcg per serving; the middle half of products list 75 mcg to 150 mcg, the median 150 mcg.DV 150 mcgUL 1,100 mcg56 mcg

79% of 6,382 products listing iodine give more (median 150 mcg).

Magnesium11 mg3%Magnesium in Spirulina against 14,003 products11 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg11 mg

91% of 14,003 products listing magnesium give more (median 86 mg).

Copper0.2 mg27%Copper in Spirulina against 6,468 products0.2 mg per serving; the middle half of products list 0.5 mg to 2 mg, the median 1 mg.DV 0.9 mgUL 10 mg0.2 mg

88% of 6,468 products listing copper give more (median 1 mg).

Manganese0.1 mg5%Manganese in Spirulina against 7,016 products0.1 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg0.1 mg

97% of 7,016 products listing manganese give more (median 2 mg).

Sodium15 mg1%Sodium in Spirulina against 14,514 products15 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.15 mg

72% of 14,514 products listing sodium give more (median 55 mg).

Source: NIH ODS Dietary Supplement Label Database, label 318798 (entered September 25, 2024), 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:

  • 98% of the 9,830 products that print an amount of thiamin list more than its 0.1 mg of thiamin (median 5 mg).
  • 99% of the 9,824 products that print an amount of riboflavin list more than its 0.1 mg of riboflavin (median 4 mg).
  • 98% of the 12,413 products that print an amount of niacin list more than its 1 mg of niacin (median 20 mg).
  • 99% of the 15,277 products that print an amount of vitamin B6 list more than its 0.1 mg of vitamin B6 (median 6 mg).
  • 91% of the 14,003 products that print an amount of magnesium list more than its 11 mg of magnesium (median 86 mg).
  • 88% of the 6,468 products that print an amount of copper list more than its 0.2 mg of copper (median 1 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'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 To start with the recommended dosage is 1/3 teaspoon a day, gradually increasing to 3 teaspoons, taken with flood or around an hour before mealtimes.
Warnings
Caution Do not exceed recommended dose. Do not use if safety seal is damaged or missing.
Pregnant or nursing mothers, children under the age of 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.
Pregnant or nursing mothers, children under the age of 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.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 318798.

What else is on the label?

Other ingredients: Spirulina, Powder.

How many labels does Spirulina have?

One label is on file, entered on September 25, 2024.

  1. Label 318798 (current) Entered September 25, 2024 · on the market · 0.26 lbs

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

Who makes it?

The label names Natural Smart Health, LLC (distributor), Wichita Falls, Texas. All Natural Smart Health products.

Where next?