PlainVitamins

Fast-Acting

by GNC TriFlex · other (e.g. tea bag) · 120 caplets

  • On the market (NIH)
  • UPC 0 48107 17405 7
  • DSLD label 243613
  • Serving 2 caplets; amounts per 4 caplets
  • 30 servings

Fast-Acting by GNC TriFlex lists 5 ingredients, 5 with an amount per serving of 4 caplets, such as 1,500 mg of glucosamine hydrochloride, 1,200 mg of chondroitin sulfate, sodium, 105 mg of turmeric (curcuma longa) rhizome extract and 100 mg of ApresFlex boswellia serrata gum extract, beside 1 Nutrition Facts row (calories, fat and the like). Its current label entered the NIH Dietary Supplement Label Database on February 25, 2021.

What is in Fast-Acting?

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

Fast-Acting: Supplement Facts rows against the market (DSLD label 243613, January 2026 release)
IngredientAmount% DVAmong products listing it
Sodium130 mg6%Sodium in Fast-Acting against 14,514 products130 mg per serving; the middle half of products list 15 mg to 142 mg, the median 55 mg.130 mg

Higher than 72% of 14,514 products listing sodium (median 55 mg). Per day at the most servings: 260 mg.

Glucosamine Hydrochloride1,500 mgGlucosamine Hydrochloride in Fast-Acting against 628 products1.5 g per serving; the middle half of products list 0.75 g to 1.5 g, the median 1.5 g.1.5 g

5% of 628 products listing glucosamine hydrochloride give more (median 1.5 g). Per day at the most servings: 3 g.

Chondroitin Sulfate, Sodium1,200 mgChondroitin Sulfate in Fast-Acting against 950 products1,200 mg per serving; the middle half of products list 200 mg to 1,200 mg, the median 400 mg.1,200 mg

Higher than 74% of 950 products listing chondroitin sulfate (median 400 mg). Per day at the most servings: 2,400 mg.

Turmeric (Curcuma longa) rhizome extractas CurcuminoidsTurmeric (Curcuma longa) rhizome extract (Form: 95% Curcuminoids Note: 100 mg) PlantPart: rhizome Genus: Curcuma Species: longa105 mgTurmeric in Fast-Acting against 2,369 products105 mg per serving; the middle half of products list 50 mg to 500 mg, the median 150 mg.105 mg

56% of 2,369 products listing turmeric give more (median 150 mg). Per day at the most servings: 210 mg.

ApresFlex Boswellia serrata gum extractas 3-0-Acetyl-11-Keto Beta Boswellic AcidApresFlex Boswellia serrata gum extract (Form: 20% 3-0-Acetyl-11-Keto Beta Boswellic Acid Note: 20 mg) PlantPart: gum Genus: Boswellia Species: serrata100 mgBoswellia in Fast-Acting against 665 products100 mg per serving; the middle half of products list 100 mg to 290 mg, the median 135 mg.100 mg

53% of 665 products listing boswellia give more (median 135 mg). Per day at the most servings: 200 mg.

MSM50 mgMethylsulfonylmethane in Fast-Acting against 1,454 products50 mg per serving; the middle half of products list 150 mg to 1,000 mg, the median 500 mg.50 mg

89% of 1,454 products listing methylsulfonylmethane give more (median 500 mg). Per day at the most servings: 100 mg.

Source: NIH ODS Dietary Supplement Label Database, label 243613 (entered February 25, 2021), 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:

  • 89% of the 1,454 products that print an amount of methylsulfonylmethane list more than its 50 mg of MSM (filed by NIH under methylsulfonylmethane) (median 500 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 Fast-Acting'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
Directions: As a dietary supplement, take two caplets twice daily, preferably with meals.
Warnings
Keep out of reach of children.
Contains: Crustaceans (Shrimp).
Warning: Consult your physician prior to using this product if you are pregnant, nursing, taking medication, or have a medical condition.
Discontinue use two weeks prior to surgery.
Allergens and what it does not contain
No sugar, no starch, no artificial flavors, no preservatives, no wheat, gluten free, no corn, no soy, no dairy.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 243613.

What else is on the label?

Other ingredients: Microcrystaline Cellulose, Hydroxypropyl Methylcellulose, Croscarmellose Sodium, Crospovidone, Magnesium Stearate, Titanium Dioxide, Silicon Dioxide, Polyethylene Glycol, Talc, Riboflavin.

How many labels does Fast-Acting have?

6 labels are on file under this name since January 25, 2017: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 243613 (current) Entered February 25, 2021 · on the market · 120 caplets · UPC 0 48107 17405 7
  2. Label 243612 Entered February 25, 2021 · on the market · 240 caplets · UPC 0 48107 17406 4
  3. Label 76846 Entered August 22, 2017 · off the market April 25, 2024 · 240 caplets
  4. Label 76845 Entered August 22, 2017 · off the market April 25, 2024 · 120 caplets
  5. Label 69621 Entered January 25, 2017 · off the market May 10, 2017 · 240 caplets
  6. Label 69618 Entered January 25, 2017 · off the market May 10, 2017 · 120 caplets

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 TriFlex products.

Where next?