PlainVitamins

Pure L-Arginine L-Pyroglutamate Powder

by Hard Rhino · powder · 500 grams

  • On the market (NIH)
  • DSLD label 34523
  • Serving 1,500 mg; amounts per 2 mg
  • 250 servings

Pure L-Arginine L-Pyroglutamate Powder by Hard Rhino lists one ingredient: 2 g of L-arginine per serving of 2 mg. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2014.

What is in Pure L-Arginine L-Pyroglutamate Powder?

Each row as the label prints it, per serving of 2 mg. 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).

Pure L-Arginine L-Pyroglutamate Powder: Supplement Facts rows against the market (DSLD label 34523, January 2026 release)
IngredientAmount% DVAmong products listing it
L-Arginine2 gArginine in Pure L-Arginine L-Pyroglutamate Powder against 1,455 products2,000 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.2,000 mg

Higher than 87% of 1,455 products listing arginine (median 500 mg).

Source: NIH ODS Dietary Supplement Label Database, label 34523 (entered June 25, 2014), 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?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

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?

6 products list the very same ingredients; the nearest amounts come first.

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: Dosage is 1500 mg daily mixed with juice or water on an empty stomach. As with all out powders a micro scale is strongly recommended for proper dosage.
Suggested Use: Dosage is 10-25 grams split into 2-5 dosages for a 165 Lbs or 75kg person. Mix with juice or water, take on an empty stomach.
Warnings
WARNING: A scale is required for accurate measurements.
Keep away from children.
Do not take this or any other supplement if you are pregnant or nursing.
Do not take if you have high blood pressure or any medical complications.
Do not take this or any other supplement if you are pregnant or nursing, have high blood pressure or taking other prescription drugs.
Allergens and what it does not contain
No added fillers No flow agents No driers No other ingredients
Allergens: This product contains NO Soy, Milk & Byproducts, Eggs, Fish, Shellfish, Wheat, Gluten, Tree Nuts, or Sesame Seeds.
Storage
Storage: Store in a cool and dry place. Keep away from strong light & heat.

Source: label statements in DSLD label 34523.

What else is on the label?

Other ingredients: L-Arginine, Powder.

How many labels does Pure L-Arginine L-Pyroglutamate Powder have?

One label is on file, entered on June 25, 2014.

  1. Label 34523 (current) Entered June 25, 2014 · on the market · 500 grams

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

Who makes it?

The label names GUARDIAN Biosciences (manufacturer), Phoenix, Arizona. All Hard Rhino products.

Where next?