PlainVitamins

King Nitric Oxide

by Top Shelf · capsule · 120 capsules

  • On the market (NIH)
  • DSLD label 321883
  • Serving 4 capsules
  • 30 servings

King Nitric Oxide by Top Shelf lists 7 ingredients, 7 with an amount per serving of 4 capsules, such as 200 mg of vitamin C, 125 mcg (5,000 IU) of vitamin D3, 1,000 mg of L-citrulline and 750 mg of nitrosigine. Its current label entered the NIH Dietary Supplement Label Database on January 23, 2025.

What is in King Nitric Oxide?

Each row as the label prints it, per serving of 4 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).

King Nitric Oxide: Supplement Facts rows against the market (DSLD label 321883, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Pureway-C200 mg222%Vitamin C in King Nitric Oxide against 18,583 products200 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg200 mg

Higher than 63% of 18,583 products listing vitamin C (median 100 mg).

Vitamin D3as Cholecalciferol125 mcg (5,000 IU)625%Vitamin D in King Nitric Oxide against 14,175 products125 mcg per serving; the middle half of products list 10 mcg to 25 mcg, the median 15 mcg.DV 20 mcgUL 100 mcg125 mcg

Higher than 92% of 14,175 products listing vitamin D (median 15 mcg). 1.3 times the adult UL a day.

L-Citrulline1,000 mgCitrulline in King Nitric Oxide against 1,209 products1 g per serving; the middle half of products list 1 g to 5 g, the median 3 g.1 g

73% of 1,209 products listing citrulline give more (median 3 g).

Nitrosigineas Inositol Arginine Silicate750 mgArginine silicate inositol in King Nitric Oxide against 274 products0.75 g per serving; the middle half of products list 0.75 g to 1.5 g, the median 1.37 g.0.75 g

53% of 274 products listing arginine silicate inositol give more (median 1.37 g).

Cistanche tubulosa Stem Extract10:1 extract500 mg
Setriaas L-Glutathione100 mgGlutathione in King Nitric Oxide against 717 products100 mg per serving; the middle half of products list 10 mg to 200 mg, the median 50 mg.100 mg

Higher than 61% of 717 products listing glutathione (median 50 mg).

Menaquinone-7as Vitamin K2100 mcg83%*Vitamin K in King Nitric Oxide against 4,607 products100 mcg per serving; the middle half of products list 35 mcg to 100 mcg, the median 80 mcg.DV 120 mcg100 mcg

Higher than 69% of 4,607 products listing vitamin K (median 80 mcg).

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 321883 (entered January 23, 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?

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:

  • At 1 serving a day, the most its directions give, the label lists 125 mcg (5,000 IU) of vitamin D, 1.3 times the adult Tolerable Upper Intake Level.

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 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 King Nitric Oxide's, rare ingredients counting for more.

  • N.o. XtJacked Factory 3 shared, 40% alike

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 else is on the label?

Other ingredients: Hypromellose, Magnesium Stearate, Silicon Dioxide, Microcrystalline Cellulose.

How many labels does King Nitric Oxide have?

One label is on file, entered on January 23, 2025.

  1. Label 321883 (current) Entered January 23, 2025 · on the market · 120 capsules

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

Who makes it?

The label names Top Shelf Grind (manufacturer). All Top Shelf products.

Where next?