Harness Key West
by ARN Arms Race Nutrition · liquid · 12 fluid ounces
- On the market (NIH)
- UPC 8 50051 03164 1
- DSLD label 328365
- Serving 12 fl oz (1 bottle)
- 1 servings
Harness Key West by ARN Arms Race Nutrition lists 6 ingredients, 6 with an amount per serving of 12 fl oz, such as 5,000 mg of L-citrulline, 3,200 mg of beta-alanine, 300 mg of alpha-glycerylphosphorylcholine and 300 mg of caffeine anhydrous. Its current label entered the NIH Dietary Supplement Label Database on June 25, 2025.
What is in Harness Key West?
Each row as the label prints it, per serving of 12 fl oz. 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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| L-Citrulline | 5,000 mg | Higher than 73% of 1,209 products listing citrulline (median 3 g). | |
| Beta-Alanine | 3,200 mg | Higher than 66% of 1,778 products listing beta-alanine (median 2 g). | |
| Alpha-Glycerylphosphorylcholineas L-Alpha-Glycerylphosphorylcholine50% | 300 mg | Higher than 53% of 656 products listing alpha-GPC (median 200 mg). | |
| Caffeine Anhydrous | 300 mg | Higher than 92% of 3,358 products listing caffeine (median 200 mg). | |
| elevATPas Ancient Peat Extract, Apple Extract | 150 mg | ||
| Dicaffeine Malate | 75 mg | ||
| Huperzia serrata Leaf, Stem Extractas Huperzia serrata Leaf Extract, Huperzia serrata Stem Extract1% Huperzine A | 10 mg | 20% of 164 products listing chinese club moss give more (median 10 mg). |
Source: NIH ODS Dietary Supplement Label Database, label 328365 (entered June 25, 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:
- Its 375 mg of caffeine (2 rows of the label added together) is higher than 92% of the 3,358 caffeine products that print an amount; 241 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?
The products whose ingredient lists overlap most with Harness Key West's, rare ingredients counting for more.
- Engage Loaded LemonadeFINAFLEX 4 shared, 59% alike
- Engage Sour WatermelonFINAFLEX 4 shared, 59% alike
- Red White & Boom Back In Black Lemonade'Merica Labz 5 shared, 57% alike
- Red White & Boom Daytona Beach'Merica Labz 5 shared, 57% alike
- Red White & Boom Freedom'Merica Labz 5 shared, 57% alike
- Red White & Boom Fresa Lima'Merica Labz 5 shared, 57% 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 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
- Directions: As a dietary supplement, take one (1) serving (12 fl oz.) 15-30 min prior to your workout. Do not exceed one (1) serving within a 24 hour period.
- Warnings
- Do not exceed one (1) serving within a 24 hour period.
- Warning: Keep out of reach of children. Do not use this product if you are under the age of 18.
- Do not take if you have a preexisting medical condition or are taking any medications. Do not use if you are pregnant or nursing.
- As with any dietary supplement, consult a healthcare professional before using this product. Immediately discontinue use and consult a healthcare professional if you experience any adverse reactions. Do not purchase if outer seal is broken or damaged.
- Warning: This product may expose you to chemicals including lead known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65warnings.ca.gov
Source: label statements in DSLD label 328365.
What else is on the label?
Other ingredients: Water, Filtered, Citric Acid, Malic Acid, Natural & Artificial Flavors, Sucralose, Sodium Hexametaphosphate, Acesulfame Potassium, Potassium Sorbate, Sodium Benzoate, Calcium Disodium EDTA.
How many labels does Harness Key West have?
One label is on file, entered on June 25, 2025.
- Label 328365 (current) Entered June 25, 2025 · on the market · 12 fluid ounces · UPC 8 50051 03164 1
DSLD also links this label to: Harness Pre-Workout Big Apple (flavor difference), Harness Lemon Rush (flavor difference), Harness Rainbow Sherbet (flavor difference), Harness Venice Beach (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 Arms Race Nutrition, LLC (distributor), Statesville, NC. All ARN Arms Race Nutrition products.