PlainVitamins

Nuclear X Watermelon

by Met-RX · powder · 0.6 lbs

  • Off the market since September 2016 (NIH)
  • UPC 7 86560 59130 0
  • DSLD label 49190
  • Serving 12 to 24 g (1-2 scoops); amounts per 24 g
  • 12 servings

Nuclear X Watermelon by Met-RX lists 6 ingredients, 6 with an amount per serving of 24 g, such as 100 mg of niacin, 4,800 mg of CarnoSyn, 3,000 mg of arginine and 2,000 mg of creatine HCl, beside 3 Nutrition Facts rows (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on August 25, 2015.

What is in Nuclear X Watermelon?

Each row as the label prints it, per serving of 24 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).

Nuclear X Watermelon: Supplement Facts rows against the market (DSLD label 49190, January 2026 release)
IngredientAmount% DVAmong products listing it
Calories80 Calories
Total Carbohydrates5 g2%Carbohydrate in Nuclear X Watermelon against 21,979 products5 g per serving; the middle half of products list 1 g to 6 g, the median 3 g.5 g

Higher than 65% of 21,979 products listing carbohydrate (median 3 g).

Sugarless than 1 g
Niacinas NiacinamideNiacin (Form: as Niacinamide)100 mg500%Niacin in Nuclear X Watermelon against 12,413 products100 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg100 mg

Higher than 88% of 12,413 products listing niacin (median 20 mg). 2.9 times the adult UL a day.

Sodium10 mg1%Sodium in Nuclear X Watermelon against 14,514 products10 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.10 mg

78% of 14,514 products listing sodium give more (median 55 mg).

CarnoSynas Beta-AlanineBeta-Alanine (Alt. Name: CarnoSyn) Note: 2.4 g4,800 mgBeta-Alanine in Nuclear X Watermelon against 1,778 products4.8 g per serving; the middle half of products list 1.6 g to 3.2 g, the median 2 g.4.8 g

Higher than 97% of 1,778 products listing beta-alanine (median 2 g).

Arginineas L-Arginine Alpha-KetoglutarateArginine (Form: from L-Arginine Alpha-Ketoglutarate, and L-Arginine) Note: 1.5 g3,000 mgArginine in Nuclear X Watermelon against 1,455 products3,000 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.3,000 mg

Higher than 91% of 1,455 products listing arginine (median 500 mg).

L-Citrulline DL-MalateL-Citrulline DL-Malate Note: (1:1) (1 g)2,000 mg
Creatine HClCreatine HCl Note: 1 g2,000 mgCreatine in Nuclear X Watermelon against 1,768 products2 g per serving; the middle half of products list 1.11 g to 5 g, the median 2.5 g.2 g

54% of 1,768 products listing creatine give more (median 2.5 g).

Agmatine Sulfate1,000 mgAgmatine in Nuclear X Watermelon against 514 products1,000 mg per serving; the middle half of products list 500 mg to 1,000 mg, the median 750 mg.1,000 mg

Higher than 62% of 514 products listing agmatine (median 750 mg).

Caffeine Anhydrous400 mgCaffeine in Nuclear X Watermelon against 3,358 products400 mg per serving; the middle half of products list 100 mg to 275 mg, the median 200 mg.400 mg

Higher than 93% of 3,358 products listing caffeine (median 200 mg).

Source: NIH ODS Dietary Supplement Label Database, label 49190 (entered August 25, 2015), 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?

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 100 mg of niacin, 2.9 times the adult Tolerable Upper Intake Level.
  • Its 4.8 g of CarnoSyn (filed by NIH under beta-alanine) is higher than 97% of the 1,778 beta-alanine products that print an amount; 47 list more.
  • Its 3,000 mg of arginine is higher than 91% of the 1,455 arginine products that print an amount; 71 list more.
  • Its 400 mg of caffeine is higher than 93% of the 3,358 caffeine products that print an amount; 149 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?

1 product lists 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
Use in conjunction with an intense daily exercise program and a balanced diet including an adequate caloric intake.
Directions: This product is extremely potent!!! DO not exceed recommended daily intake, use only as directed. Mix one scoop with 8-10 fl. oz. of water 15-30 minutes before training. If well tolerated gradually increase servings to two scoops per day with 12-16 fl. oz. for desired effect. Do not take on an empty stomach.
Warnings
WARNING: Not intended for use by pregnant or nursing women. If you are taking any medications or have any medical condition, consult your doctor before use.
Avoid this product if you have kidney disease. Discontinue use and consult your doctor if any adverse reactions occur.
Not intended for use by persons under the age of 18 or for those sensitive to caffeine.
Beta-alanine may cause a temporary tingling sensation, which is a normal reaction.
This product contains caffeine. Avoid consumption of caffeine, which may cause adverse effects.
Keep out of reach of children.
Tamper resistant: Do not use if seal under cap is broken or missing.
Allergens and what it does not contain
DMAA + Dendrobium free
We left out DMAA…Resulting in our strongest pre-workout yet.
Storage
Store at room temperature and avoid excessive heat.

Source: label statements in DSLD label 49190.

What else is on the label?

Other ingredients: Maltodextrin, Natural and Artificial flavors, Citric Acid, Silica, Sucralose, FD&C Red No. 40, FD&C Blue No. 1.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): CarnoSyn(R) Carnosine Synthesizer.

How many labels does Nuclear X Watermelon have?

One label is on file, entered on August 25, 2015.

  1. Label 49190 (current) Entered August 25, 2015 · off the market September 9, 2016 · 0.6 lbs · UPC 7 86560 59130 0

DSLD also links this label to: Nuclear X Radioactive Punch (flavor difference), Nuclear X Citrus Surge (flavor difference), Nuclear X Strawberry Lemonade (flavor difference), Nuclear X Sour Apple (flavor difference), Nuclear X Strawberry Lemonade (flavor difference), Pre-Workout Nuclear X Sour Apple (flavor difference), Pre-Workout Nuclear X Citrus Surge (flavor difference), Pre-Workout Nuclear X Radioactive Punch (flavor difference).

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

Who makes it?

The label names MET-Rx Nutrition, Inc. (distributor), Boca Raton, FL. All Met-RX products.

Where next?