PlainVitamins

Joint Flex

by Priority One Nutritional Supplements · capsule · 120 capsules

  • On the market (NIH)
  • UPC 8 15354 02077 8
  • DSLD label 277377
  • Serving 2 capsules
  • 60 servings

Joint Flex by Priority One Nutritional Supplements lists 5 ingredients, 5 with an amount per serving of 2 capsules, such as 24 mg of manganese, 750 mg of glucosamine hydrochloride, 600 mg of chondroitin sulfate and 20 mg of bromelain. Its current label entered the NIH Dietary Supplement Label Database on November 22, 2022.

What is in Joint Flex?

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

Joint Flex: Supplement Facts rows against the market (DSLD label 277377, January 2026 release)
IngredientAmount% DVAmong products listing it
Manganeseas Manganese Ascorbate, Manganese Carbonate24 mg1,043%Manganese in Joint Flex against 7,016 products24 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg24 mg

Higher than over 99% of 7,016 products listing manganese (median 2 mg). Per day at the most servings: 48 mg. 4.4 times the adult UL a day.

Glucosamine Hydrochloride98.5750 mgGlucosamine Hydrochloride in Joint Flex against 628 products0.75 g per serving; the middle half of products list 0.75 g to 1.5 g, the median 1.5 g.0.75 g

68% of 628 products listing glucosamine hydrochloride give more (median 1.5 g). Per day at the most servings: 1.5 g.

Chondroitin Sulfate90%600 mgChondroitin Sulfate in Joint Flex against 950 products600 mg per serving; the middle half of products list 200 mg to 1,200 mg, the median 400 mg.600 mg

Higher than 58% of 950 products listing chondroitin sulfate (median 400 mg). Per day at the most servings: 1,200 mg.

Bromelain3,600 MCU/g20 mgBromelain in Joint Flex against 1,337 products20 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.20 mg

78% of 1,337 products listing bromelain give more (median 50 mg). Per day at the most servings: 40 mg.

Indian Frankincense Resin Extractas Boswellic Acid70% Boswellic Acid50 mgBoswellia in Joint Flex against 665 products50 mg per serving; the middle half of products list 100 mg to 290 mg, the median 135 mg.50 mg

86% of 665 products listing boswellia give more (median 135 mg). Per day at the most servings: 100 mg.

Source: NIH ODS Dietary Supplement Label Database, label 277377 (entered November 22, 2022), 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:

  • At 2 servings a day, the most its directions give, the label lists 48 mg of manganese, 4.4 times the adult Tolerable Upper Intake Level.
  • 86% of the 665 products that print an amount of boswellia list more than its 50 mg of indian frankincense resin extract (filed by NIH under boswellia) (median 135 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 Joint 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
Recommendations: Take two (2) capsules in the morning and two (2) capsules in the evening for the first 60 days, then adjust according to needs, or as directed by your physician.
Warnings
Warning: If you are pregnant or breast feeding, consult your physician before using this product.
Some ingredients derived from shellfish.
Keep out of reach of children.
Contains crustacean shellfish (crayfish).
Allergens and what it does not contain
Contains no preservatives.
Non-GMO
Storage
Keep container tightly closed, store in a cool, dry place.

Source: label statements in DSLD label 277377.

What else is on the label?

Other ingredients: Silicon Dioxide, Maltodextrin, Sodium Sulfate, Capsule.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): GMP Certified.

How many labels does Joint Flex have?

2 labels are on file under this name since September 25, 2020: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 277377 (current) Entered November 22, 2022 · on the market · 120 capsules · UPC 8 15354 02077 8
  2. Label 236767 Entered September 25, 2020 · off the market March 16, 2022 · 120 capsules · UPC 8 15354 02077 8

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

Who makes it?

The label names Priority One Nutritional Supplements, Inc. (distributor). All Priority One Nutritional Supplements products.

Where next?