PlainVitamins

Flex

by Amazing Muscle · capsule · 60 veggie capsules

  • On the market (NIH)
  • UPC 8 10180 02623 9
  • DSLD label 251145
  • Serving 2 veggie capsules
  • 30 servings

Flex by Amazing Muscle lists 9 ingredients, 9 with an amount per serving of 2 veggie capsules, such as 500 mg of turmeric extract, 100 mg of ApresFlex extract, 100 mg of white willow extract and 50 mg of grape seed extract. Its current label entered the NIH Dietary Supplement Label Database on June 23, 2021.

What is in Flex?

Each row as the label prints it, per serving of 2 veggie 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).

Flex: Supplement Facts rows against the market (DSLD label 251145, January 2026 release)
IngredientAmount% DVAmong products listing it
Turmeric extractas Curcuminoids500 mgTurmeric in Flex against 2,369 products500 mg per serving; the middle half of products list 50 mg to 500 mg, the median 150 mg.500 mg

Higher than 72% of 2,369 products listing turmeric (median 150 mg).

ApresFlex extractas Acetyl-11-Keto-Beta-Boswellic Acid100 mgBoswellia in Flex 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).

White Willow extractas Salicin100 mgWhite Willow in Flex against 256 products100 mg per serving; the middle half of products list 80 mg to 400 mg, the median 150 mg.100 mg

55% of 256 products listing white willow give more (median 150 mg).

Grape seed extractas total Proanthocyanidins50 mgGrape in Flex against 1,900 products50 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.50 mg

48% of 1,900 products listing grape give more (median 50 mg).

Ginger root extractas Gingerols50 mgGinger in Flex against 1,770 products50 mg per serving; the middle half of products list 25 mg to 150 mg, the median 60 mg.50 mg

51% of 1,770 products listing ginger give more (median 60 mg).

Uc-Ii40 mgCartilage in Flex against 199 products40 mg per serving; the middle half of products list 40 mg to 750 mg, the median 100 mg.40 mg

57% of 199 products listing cartilage give more (median 100 mg).

UC-II standardized Cartilage40 mg
Total Collagen10 mgCollagen in Flex against 1,008 products0.01 g per serving; the middle half of products list 0.1 g to 4.2 g, the median 1 g.0.01 g

90% of 1,008 products listing collagen give more (median 1 g).

BioPerine Black Pepper (fruit) extractas Piperine5 mgBlack Pepper in Flex against 2,363 products5 mg per serving; the middle half of products list 5 mg to 10 mg, the median 5 mg.5 mg

33% of 2,363 products listing black pepper give more (median 5 mg).

Source: NIH ODS Dietary Supplement Label Database, label 251145 (entered June 23, 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:

  • 57% of the 199 products that print an amount of cartilage list more than its 40 mg of uc-ii (filed by NIH under cartilage) (median 100 mg).
  • 90% of the 1,008 products that print an amount of collagen list more than its 0.01 g of total collagen (filed by NIH under collagen) (median 1 g).

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 Flex'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
Suggested Use: As a dietary supplement, adults take two (2) veggie capsules daily, or as directed by health care professional.
Warnings
Caution: Not for those under the age of 18.
If you are taking any medication(s) or have any medical condition, consult your doctor before using this product.
Discontinue use if any adverse reactions occur.
Keep out of reach of children.
Do not use if safety seal is damaged or missing.

Source: label statements in DSLD label 251145.

What else is on the label?

Other ingredients: Vegetable Cellulose, Rice concentrate.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Good Manufacturing Practice Quality Product Made in USA.

How many labels does Flex have?

One label is on file, entered on June 23, 2021.

  1. Label 251145 (current) Entered June 23, 2021 · on the market · 60 veggie capsules · UPC 8 10180 02623 9

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

Who makes it?

The label names Amazing Muscle (distributor), Jersey City, NJ. All Amazing Muscle products.

Where next?