PlainVitamins

Joint, Tendon, Ligament I

by Douglas Laboratories · capsule · 90 vegetarian capsules

  • On the market (NIH)
  • UPC 3 10539 03901 4
  • DSLD label 261203
  • Serving 3 vegetarian capsules
  • 30 servings

Joint, Tendon, Ligament I by Douglas Laboratories lists 12 ingredients, 12 with an amount per serving of 3 vegetarian capsules, such as 2 mg of manganese, 500 mg of cynatine FLX, 400 mg of methylsulfonylmethane and 400 mg of L-arginine. Its current label entered the NIH Dietary Supplement Label Database on April 11, 2022.

What is in Joint, Tendon, Ligament I?

Each row as the label prints it, per serving of 3 vegetarian 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, Tendon, Ligament I: Supplement Facts rows against the market (DSLD label 261203, January 2026 release)
IngredientAmount% DVAmong products listing it
Manganeseas Manganese Amino Acid Chelate2 mg100%Manganese in Joint, Tendon, Ligament I against 7,016 products2 mg per serving; the middle half of products list 1 mg to 3.92 mg, the median 2 mg.DV 2.3 mgUL 11 mg2 mg

38% of 7,016 products listing manganese give more (median 2 mg).

Cynatine FLX500 mgKeratin in Joint, Tendon, Ligament I against 102 products500 mg per serving; the middle half of products list 77.5 mg to 500 mg, the median 500 mg.500 mg

0% of 102 products listing keratin give more (median 500 mg).

Methylsulfonylmethane400 mgMethylsulfonylmethane in Joint, Tendon, Ligament I against 1,454 products400 mg per serving; the middle half of products list 150 mg to 1,000 mg, the median 500 mg.400 mg

51% of 1,454 products listing methylsulfonylmethane give more (median 500 mg).

L-Arginine400 mgArginine in Joint, Tendon, Ligament I against 1,455 products400 mg per serving; the middle half of products list 167 mg to 1,000 mg, the median 500 mg.400 mg

60% of 1,455 products listing arginine give more (median 500 mg).

L-Proline250 mgProline in Joint, Tendon, Ligament I against 387 products250 mg per serving; the middle half of products list 100 mg to 1,289 mg, the median 487.5 mg.250 mg

57% of 387 products listing proline give more (median 487.5 mg).

Glycine250 mgGlycine in Joint, Tendon, Ligament I against 1,078 products250 mg per serving; the middle half of products list 100 mg to 846 mg, the median 300 mg.250 mg

52% of 1,078 products listing glycine give more (median 300 mg).

ApresFlexas Boswellia serrata Gum Extractstandardized to 20% 3-O-acetyl-11-keto-beta-boswellic acid100 mgBoswellia in Joint, Tendon, Ligament I 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).

Strawberry fruit extractas Polyphenolsstandardized to 2% polyphenols25 mgStrawberry in Joint, Tendon, Ligament I against 85 products25 mg per serving; the middle half of products list 100 mg to 450 mg, the median 250 mg.25 mg

86% of 85 products listing strawberry give more (median 250 mg).

Spinach, Powderas Spinacia oleracea, Spinacia oleracea25 mgSpinach in Joint, Tendon, Ligament I against 216 products25 mg per serving; the middle half of products list 46.75 mg to 300 mg, the median 125 mg.25 mg

78% of 216 products listing spinach give more (median 125 mg).

Siliconas Silicon Amino Acid Chelate15 mgSilicon in Joint, Tendon, Ligament I against 1,220 products15 mg per serving; the middle half of products list 2 mg to 10.5 mg, the median 4 mg.15 mg

Higher than 79% of 1,220 products listing silicon (median 4 mg).

Enzogenol Pine bark extractas Proanthocyanidinsstandardized to 80% proanthocyanidins10 mg
Hyaluronic Acidas Sodium Hyaluronate5 mgHyaluronic acid in Joint, Tendon, Ligament I against 900 products5 mg per serving; the middle half of products list 10 mg to 100 mg, the median 50 mg.5 mg

78% of 900 products listing hyaluronic acid give more (median 50 mg).

Source: NIH ODS Dietary Supplement Label Database, label 261203 (entered April 11, 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:

  • 86% of the 85 products that print an amount of strawberry list more than its 25 mg of strawberry (median 250 mg).

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.

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 3 capsules daily or as directed by your health professional.
Warnings
Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, consult your health professional before use.
Keep out of the reach of children.
Use only if safety seal is intact.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 261203.

What else is on the label?

Other ingredients: Hydroxypropylmethylcellulose, Stearate, Microcrystalline Cellulose, Silica.

How many labels does Joint, Tendon, Ligament I have?

3 labels are on file under this name since March 25, 2014: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 261203 (current) Entered April 11, 2022 · on the market · 90 vegetarian capsules · UPC 3 10539 03901 4
  2. Label 232554 Entered August 23, 2020 · off the market September 9, 2021 · 90 vegetarian capsules · UPC 3 10539 03901 4
  3. Label 31126 Entered March 25, 2014 · off the market May 22, 2020 · 90 vegetarian capsules · UPC 3 10539 03901 4

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

Who makes it?

The label names Douglas Laboratories (manufacturer), Pittsburgh, PA. All Douglas Laboratories products.

Where next?