N.o. Xt

by Jacked Factory · capsule · 90 veggie capsules

  • On the market (NIH)
  • UPC 6 72691 00452 2
  • DSLD label 319463
  • Serving 3 capsules
  • 30 servings

N.o. Xt by Jacked Factory lists 5 ingredients, 5 with an amount per serving of 3 capsules, such as 500 mg of L-citrulline, 66.7 mg of L-arginine, 66.7 mg of L-glutathione and 1.7 mg of BioPerine. Its current label entered the NIH Dietary Supplement Label Database on October 24, 2024.

What is in N.o. Xt?

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).

N.o. Xt: Supplement Facts rows against the market (DSLD label 319463, January 2026 release)
IngredientAmount% DVAmong products listing it
L-Citrulline500 mgCitrulline in N.O. XT against 1,209 products0.5 g per serving; the middle half of products list 1 g to 5 g, the median 3 g.0.5 g

86% of 1,209 products listing citrulline give more (median 3 g). Per day at the most servings: 1 g.

L-Argininesourced from66.7 mgArginine in N.O. XT against 1,455 products66.7 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.66.7 mg

85% of 1,455 products listing arginine give more (median 500 mg). Per day at the most servings: 133.4 mg.

Nitrosigineas Arginine Silicate Inositol166.7 mgArginine silicate inositol in N.O. XT against 274 products0.167 g per serving; the middle half of products list 0.75 g to 1.5 g, the median 1.37 g.0.167 g

99% of 274 products listing arginine silicate inositol give more (median 1.37 g). Per day at the most servings: 0.333 g.

L-Glutathioneas Glutathione66.7 mgGlutathione in N.O. XT against 717 products66.7 mg per serving; the middle half of products list 10 mg to 200 mg, the median 50 mg.66.7 mg

Higher than 59% of 717 products listing glutathione (median 50 mg). Per day at the most servings: 133.4 mg.

BioPerineas Piperinestandardized to contain 95% piperine1.7 mgBlack Pepper in N.O. XT against 2,363 products1.7 mg per serving; the middle half of products list 5 mg to 10 mg, the median 5 mg.1.7 mg

96% of 2,363 products listing black pepper give more (median 5 mg). Per day at the most servings: 3.4 mg.

Source: NIH ODS Dietary Supplement Label Database, label 319463 (entered October 24, 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:

  • 99% of the 274 products that print an amount of arginine silicate inositol list more than its 0.167 g of nitrosigine (filed by NIH under arginine silicate inositol) (median 1.37 g).
  • 96% of the 2,363 products that print an amount of black pepper list more than its 1.7 mg of BioPerine (filed by NIH under black pepper) (median 5 mg).

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 N.o. Xt'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
Recommended use: A source of substrates for nitric oxide production, a vasodilator. Directions: Adult(s) (18 years and over) 3 capsules, 2 times per day. Ensure to drink optimal fluid before, during and after exercise. Duration of use: Consult a healthcare practitioner for use beyond 2 weeks.
Warnings
Warnings: Consult a health care practitioner prior to use if you are pregnant or breastfeeding, or if you suffer from cardiovascular disease and are attempting an increase in physical activity or if your cardiovascular condition worsens. Consult a health care practitioner prior to use if you are taking any other medications or natural health products, as black pepper/piperine may alter their effectiveness , or if you are taking medication for cardiovascular diseases, erectile dysfunction, and/or blood thinners.
Duration of use: Consult a healthcare practitioner for use beyond 2 weeks. Contra-indications: Do not use if you have had a heart attack/myocardial infraction. Known adverse reactions: some people may experience gastrointestinal discomfort/disturbances. Do not use if seal is broken. Security feature is self evident
Allergen warning: This product is manufactured in a facility which may also process milk, soy, wheat, egg, peanuts, tree nuts, fish and shellfish.

Source: label statements in DSLD label 319463.

What else is on the label?

Other ingredients: Hypromellose, L-Leucine.

How many labels does N.o. Xt have?

One label is on file, entered on October 24, 2024.

  1. Label 319463 (current) Entered October 24, 2024 · on the market · 90 veggie capsules · UPC 6 72691 00452 2

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

Who makes it?

The label names Jacked Factory (distributor), St. John's, NL. All Jacked Factory products.

Where next?