PlainVitamins

Rejuv-N-8

by Natural Guardian · tablet or pill · 90 tablets

  • Off the market since October 2023 (NIH)
  • DSLD label 2134
  • Serving 1 tablet

Rejuv-N-8 by Natural Guardian lists 23 ingredients, 23 with an amount per serving of 1 tablet, such as 100 IU of vitamin A, 1 mg of vitamin C, 1 IU of vitamin E and 1 mg of vitamin B1. Its current label entered the NIH Dietary Supplement Label Database on November 25, 2011.

What is in Rejuv-N-8?

Each row as the label prints it, per serving of 1 tablet. 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).

Rejuv-N-8: Supplement Facts rows against the market (DSLD label 2134, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin A100 IU2%Vitamin A in Rejuv-N-8 against 5,772 products100 IU per serving; the middle half of products list 2,000 IU to 5,000 IU, the median 4,000 IU.100 IU

96% of 5,772 products listing vitamin A give more (median 4,000 IU). Per day at the most servings: 300 IU.

Vitamin Cas Ascorbic Acid1 mg2%Vitamin C in Rejuv-N-8 against 18,583 products1 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg1 mg

99% of 18,583 products listing vitamin C give more (median 100 mg). Per day at the most servings: 3 mg.

Vitamin Eas DL-Alpha-TocopherylVitamin E (Form: as dl-alpha tocopheryl)1 IU3%Vitamin E in Rejuv-N-8 against 6,459 products1 IU per serving; the middle half of products list 15 IU to 100 IU, the median 30 IU.1 IU

99% of 6,459 products listing vitamin E give more (median 30 IU). Per day at the most servings: 3 IU.

Vitamin B11 mg67%Thiamin in Rejuv-N-8 against 9,830 products1 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg1 mg

84% of 9,830 products listing thiamin give more (median 5 mg). Per day at the most servings: 3 mg.

Vitamin B2as Riboflavin1 mg59%Riboflavin in Rejuv-N-8 against 9,824 products1 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg1 mg

84% of 9,824 products listing riboflavin give more (median 4 mg). Per day at the most servings: 3 mg.

Niacinas NiacinamideNiacin (Form: as Niacinamide)1 mg5%Niacin in Rejuv-N-8 against 12,413 products1 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg1 mg

98% of 12,413 products listing niacin give more (median 20 mg). Per day at the most servings: 3 mg.

Vitamin B6as Pyridoxine HydrochlorideVitamin B-6 (Form: as Pyridoxine HCl)1 mg50%Vitamin B6 in Rejuv-N-8 against 15,277 products1 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg1 mg

88% of 15,277 products listing vitamin B6 give more (median 6 mg). Per day at the most servings: 3 mg.

Vitamin B12as CyanocobalaminVitamin B-12 (Form: as Cyanocobalamin)1 mcg17%Vitamin B12 in Rejuv-N-8 against 14,425 products1 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg1 mcg

98% of 14,425 products listing vitamin B12 give more (median 36 mcg). Per day at the most servings: 3 mcg.

Zincas Zinc Amino Acid ChelateZinc (Form: as Zinc Amino Acid Chelate)1 mg7%Zinc in Rejuv-N-8 against 13,186 products1 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg1 mg

96% of 13,186 products listing zinc give more (median 11 mg). Per day at the most servings: 3 mg.

Seleniumas L-Selenomethionine1 mcg1%Selenium in Rejuv-N-8 against 7,658 products1 mcg per serving; the middle half of products list 27 mcg to 100 mcg, the median 55 mcg.DV 55 mcgUL 400 mcg1 mcg

over 99% of 7,658 products listing selenium give more (median 55 mcg). Per day at the most servings: 3 mcg.

Copperas Copper Amino Acid ChelateCopper (Form: as Copper Amino Acid Chelate)1 mcg50%

This amount is far outside what other labels list for copper, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Manganeseas Manganese Amino Acid ChelateManganese (Form: as Manganese Amino Acid Chelate)1 mcg50%

This amount is far outside what other labels list for manganese, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Chromiumas Chromium Amino Acid ChelateChromium (Form: as Chromium Amino Acid Chelate)1 mcg1%Chromium in Rejuv-N-8 against 7,825 products1 mcg per serving; the middle half of products list 45 mcg to 200 mcg, the median 100 mcg.DV 35 mcg1 mcg

over 99% of 7,825 products listing chromium give more (median 100 mcg). Per day at the most servings: 3 mcg.

Glucosamine HCl1,000 mgGlucosamine Hydrochloride in Rejuv-N-8 against 628 products1 g per serving; the middle half of products list 0.75 g to 1.5 g, the median 1.5 g.1 g

62% of 628 products listing glucosamine hydrochloride give more (median 1.5 g). Per day at the most servings: 3 g.

Shark Cartilage1,000 mgCartilage in Rejuv-N-8 against 199 products1,000 mg per serving; the middle half of products list 40 mg to 750 mg, the median 100 mg.1,000 mg

Higher than 83% of 199 products listing cartilage (median 100 mg). Per day at the most servings: 3,000 mg.

Green Lipped Sea Muscle250 mgNew Zealand green-lipped mussel in Rejuv-N-8 against 78 products250 mg per serving; the middle half of products list 100 mg to 750 mg, the median 250 mg.250 mg

49% of 78 products listing new zealand green-lipped mussel give more (median 250 mg). Per day at the most servings: 750 mg.

Histidineas L-Histidine HydrochlorideHistidine (Form: as L-Histidine HCl)10 mgHistidine in Rejuv-N-8 against 591 products10 mg per serving; the middle half of products list 50 mg to 402.8 mg, the median 125 mg.10 mg

92% of 591 products listing histidine give more (median 125 mg). Per day at the most servings: 30 mg.

MSM500 mgMethylsulfonylmethane in Rejuv-N-8 against 1,454 products500 mg per serving; the middle half of products list 150 mg to 1,000 mg, the median 500 mg.500 mg

36% of 1,454 products listing methylsulfonylmethane give more (median 500 mg). Per day at the most servings: 1,500 mg.

Boron1 mgBoron in Rejuv-N-8 against 3,339 products1 mg per serving; the middle half of products list 0.3 mg to 2 mg, the median 1 mg.UL 20 mg1 mg

42% of 3,339 products listing boron give more (median 1 mg). Per day at the most servings: 3 mg.

Yucca1 mgYucca in Rejuv-N-8 against 106 products1 mg per serving; the middle half of products list 25 mg to 450 mg, the median 50 mg.1 mg

86% of 106 products listing yucca give more (median 50 mg). Per day at the most servings: 3 mg.

Devil's ClawDevil's Claw Note: as herb powder1 mgDevil's Claw in Rejuv-N-8 against 162 products1 mg per serving; the middle half of products list 30.25 mg to 507.5 mg, the median 122.5 mg.1 mg

91% of 162 products listing Devil's claw give more (median 122.5 mg). Per day at the most servings: 3 mg.

AlfalfaAlfalfa Note: as powder1 mgAlfalfa in Rejuv-N-8 against 477 products1 mg per serving; the middle half of products list 50 mg to 500 mg, the median 200 mg.1 mg

98% of 477 products listing alfalfa give more (median 200 mg). Per day at the most servings: 3 mg.

Cetyl Myristoleate1 mgCetyl Myristoleate in Rejuv-N-8 against 63 products1 mg per serving; the middle half of products list 8.25 mg to 500 mg, the median 52 mg.1 mg

76% of 63 products listing cetyl myristoleate give more (median 52 mg). Per day at the most servings: 3 mg.

Source: NIH ODS Dietary Supplement Label Database, label 2134 (entered November 25, 2011), 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:

  • 96% of the 5,772 products that print an amount of vitamin A list more than its 100 IU of vitamin A (median 4,000 IU).
  • 99% of the 18,583 products that print an amount of vitamin C list more than its 1 mg of vitamin C (median 100 mg).
  • 99% of the 6,459 products that print an amount of vitamin E list more than its 1 IU of vitamin E (median 30 IU).
  • 98% of the 12,413 products that print an amount of niacin list more than its 1 mg of niacin (median 20 mg).
  • 88% of the 15,277 products that print an amount of vitamin B6 list more than its 1 mg of vitamin B6 (median 6 mg).
  • 98% of the 14,425 products that print an amount of vitamin B12 list more than its 1 mcg of vitamin B12 (median 36 mcg).

The NIH database records 3 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 Rejuv-N-8'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, take one (1) tablet three times daily, as needed for additional protection and joint support.
Warnings
KEEP OUT OF THE REACH OF CHILDREN
CAUTION: Do not exceed recommended dose. Pregnant or nursing mothers, children under 18, and individuals with a known medical condition should consult a physician before using this or any dietary supplement.
DO NOT USE IF SAFETY SEAL IS DAMAGED OR MISSING.

Source: label statements in DSLD label 2134.

What else is on the label?

Other ingredients: Di-Calcium Phosphate, Magnesium Stearate, Stearic Acid.

How many labels does Rejuv-N-8 have?

One label is on file, entered on November 25, 2011.

  1. Label 2134 (current) Entered November 25, 2011 · off the market October 17, 2023 · 90 tablets

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

Who makes it?

The label names Natural Guardian Int. (manufacturer, distributor), Asheboro, NC. All Natural Guardian products.

Where next?