X-12
by GNC Pro Performance AMP · capsule · 30 paks
- Off the market since May 2018 (NIH)
- DSLD label 31718
- Serving 1 red capsule
X-12 by GNC Pro Performance AMP lists 4 ingredients, 1 with an amount per serving of 1 red capsule, such as 20 mg of niacin; 3 sit inside a blend without their own amounts. Its current label entered the NIH Dietary Supplement Label Database on March 25, 2014.
What is in X-12?
Each row as the label prints it, per serving of 1 red capsule. 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 |
|---|---|---|---|
| Niacin | 20 mg | 100% | 46% of 12,413 products listing niacin give more (median 20 mg). |
| Proprietary Thermogenic Blend | 243.34 mg | ||
| Caffeine Anhydrous | in the blend, no amount given | ||
| Capsimax(TM) Capsicum Fruit Extract | in the blend, no amount given | ||
| Black Pepper extract | in the blend, no amount given |
Source: NIH ODS Dietary Supplement Label Database, label 31718 (entered March 25, 2014), 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?
Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient; 3 ingredients sit inside a blend, so their amounts cannot be compared.
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?
6 products list the very same ingredients; the nearest amounts come first.
- Thermo Igniter 12XGNC Pro Performance AMP Advanced Muscle Performance same ingredients
- X12GNC Mega Men same ingredients
- Thermo Igniter 12XGNC Pro Performance same ingredients
- Ultra Energy GeneratorGNC Women's Ultra Mega · off the market same ingredients
- Ultra Energy GeneratorGNC Women's Ultra Mega Active same ingredients
- Burn X12GNC · off the market same ingredients
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, for optimal health benefits, take contents of one packet daily with food every morning. On workout days, for individuals looking to maximize energy production, X-12 can be taken 30-60 minutes prior to exercise.
Source: label statements in DSLD label 31718.
What else is on the label?
Other ingredients: Cellulose, Gelatin, Titanium Dioxide, Artificial Colors.
How many labels does X-12 have?
One label is on file, entered on March 25, 2014.
- Label 31718 (current) Entered March 25, 2014 · off the market May 16, 2018 · 30 paks
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names General Nutrition Corporation (distributor), Pittsburgh, PA. All GNC Pro Performance AMP products.