PlainVitamins

L-Arginine Pure Powder

by Best Naturals · powder · 1 lb

  • On the market (NIH)
  • UPC 8 17716 01456 2
  • DSLD label 269789
  • Serving 4.6 g (2 Level Teaspoons)
  • 98 servings

L-Arginine Pure Powder by Best Naturals lists one ingredient: 4,600 mg of L-arginine hydrochloride per serving of 4.6 g. Its current label entered the NIH Dietary Supplement Label Database on July 21, 2022.

What is in L-Arginine Pure Powder?

Each row as the label prints it, per serving of 4.6 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).

L-Arginine Pure Powder: Supplement Facts rows against the market (DSLD label 269789, January 2026 release)
IngredientAmount% DVAmong products listing it
L-Arginine Hydrochloride4,600 mgArginine in L-Arginine Pure Powder against 1,455 products4,600 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.4,600 mg

Higher than 96% of 1,455 products listing arginine (median 500 mg).

Source: NIH ODS Dietary Supplement Label Database, label 269789 (entered July 21, 2022), 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:

  • Its 4,600 mg of L-arginine hydrochloride (filed by NIH under arginine) is higher than 96% of the 1,455 arginine products that print an amount; 54 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?

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: As a dietary supplement, take two (2) level teaspoon (4.6 g) daily as needed in juice or water, preferably on empty stomach. Consider taking these other Best Naturals products: L-Citrulline and P-5-P.
Warnings
Caution: For adults only, if you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.
Discontinue use and consult your doctor if any adverse reactions occur.
Keep out of the reach of children.
Do not use if safety seal is broken or missing.
Allergens and what it does not contain
No artificial color, flavor or sweetener, no preservatives, no sugar, no starch, no corn, no soy, no egg, no lactose, no gluten, no wheat, no yeast, no fish. Sodium free.
Storage
Keep in cool, dry place.

Source: label statements in DSLD label 269789.

What else is on the label?

Other ingredients: None.

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

How many labels does L-Arginine Pure Powder have?

One label is on file, entered on July 21, 2022.

  1. Label 269789 (current) Entered July 21, 2022 · on the market · 1 lb · UPC 8 17716 01456 2

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

Who makes it?

The label names Best Naturals (distributor), Kenilworth, NJ. All Best Naturals products.

Where next?