PlainVitamins

L-Arginine Plus

by Thorne · capsule · 180 capsules

  • On the market (NIH)
  • UPC 6 93749 52601 8
  • DSLD label 336346
  • Serving 3 capsules
  • 60 servings

L-Arginine Plus by Thorne lists 7 ingredients, 7 with an amount per serving of 3 capsules, such as 300 mg of vitamin C, 920 mcg DFE of folate, 1 g of L-arginine and 200 mg of greenselect. Its current label entered the NIH Dietary Supplement Label Database on August 22, 2025.

What is in L-Arginine Plus?

Each row as the label prints it, per serving of 3 capsules. 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 Plus: Supplement Facts rows against the market (DSLD label 336346, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid300 mg333%Vitamin C in L-Arginine Plus against 18,583 products300 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg300 mg

Higher than 75% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 600 mg.

Folate920 mcg DFE230%
Quatrefolicas L-5-Methyltetrahydrofolate552 mcg5-methyltetrahydrofolate glucosamine in L-Arginine Plus against 176 products552 mcg per serving; the middle half of products list 300 mcg to 800 mcg, the median 593 mcg.552 mcg

51% of 176 products listing 5-methyltetrahydrofolate glucosamine give more (median 593 mcg). Per day at the most servings: 1,104 mcg.

L-ArginineTime-Sorb1 gArginine in L-Arginine Plus against 1,455 products1,000 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.1,000 mg

Higher than 64% of 1,455 products listing arginine (median 500 mg). Per day at the most servings: 2,000 mg.

Greenselectas Green Tea Phytosome200 mgGreen Tea in L-Arginine Plus against 2,595 products200 mg per serving; the middle half of products list 50 mg to 250 mg, the median 100 mg.200 mg

Higher than 63% of 2,595 products listing green tea (median 100 mg). Per day at the most servings: 400 mg.

Bio-Enhancedas R-Lipoic Acid50 mgAlpha Lipoic Acid in L-Arginine Plus against 2,407 products50 mg per serving; the middle half of products list 25 mg to 150 mg, the median 50 mg.50 mg

47% of 2,407 products listing alpha lipoic acid give more (median 50 mg). Per day at the most servings: 100 mg.

Trans-Resveratrol50 mgResveratrol in L-Arginine Plus against 1,123 products50 mg per serving; the middle half of products list 20 mg to 125 mg, the median 50 mg.50 mg

45% of 1,123 products listing resveratrol give more (median 50 mg). Per day at the most servings: 100 mg.

Source: NIH ODS Dietary Supplement Label Database, label 336346 (entered August 22, 2025), 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?

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 2 servings 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 L-Arginine Plus'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: Take 3 capsules two times daily or as recommended by your health-care practitioner.
Warnings
Tamper evident: Use only if bottle is sealed.
If pregnant, consult your health-care practitioner before using this product.
Allergens and what it does not contain
Gluten free
Storage
Store tightly sealed in a cool, dry place.

Source: label statements in DSLD label 336346.

What else is on the label?

Other ingredients: high and low viscosity Hydroxypropyl Methylcellulose, Hypromellose, Leucine, Silicon Dioxide.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Manufactured in the USA using US & imported ingredients NSF Contents Certified. Listed with: NSF certified (contents or GMP) (a seal is the label's claim; the certifier's own list confirms it).

How many labels does L-Arginine Plus have?

2 labels are on file under this name since October 24, 2023: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 336346 (current) Entered August 22, 2025 · on the market · 180 capsules · UPC 6 93749 52601 8
  2. Label 298083 Entered October 24, 2023 · off the market March 28, 2025 · 180 capsules · UPC 6 93749 52601 8

DSLD also links this label to: Perfusia Plus (image difference, same product), Perfusia Plus (image difference, same product).

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

Who makes it?

The label names Thorne Research, Inc. (manufacturer). All Thorne products.

Where next?