PlainVitamins

Mega Stress 100

by Only Natural · tablet or pill · 30 tablets

  • Off the market since October 2023 (NIH)
  • UPC 7-27413-00350-2
  • DSLD label 37741
  • Serving 1 tablet

Mega Stress 100 by Only Natural lists 15 ingredients, 15 with an amount per serving of 1 tablet, such as 500 mg of vitamin C, 100 mg of vitamin B1, 100 mg of vitamin B2 and 40 mg of vitamin B-3. Its current label entered the NIH Dietary Supplement Label Database on October 10, 2014.

What is in Mega Stress 100?

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).

Mega Stress 100: Supplement Facts rows against the market (DSLD label 37741, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Acerola, Green Pepper, Rose HipsVitamin C (Form: with Rose Hips, Acerola, and Green Pepper) (Alt. Name: Ascorbic Acid)500 mg833%Vitamin C in Mega Stress 100 against 18,583 products500 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg500 mg

Higher than 81% of 18,583 products listing vitamin C (median 100 mg).

Vitamin B1as Thiamine100 mg6,666%Thiamin in Mega Stress 100 against 9,830 products100 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg100 mg

Higher than 94% of 9,830 products listing thiamin (median 5 mg).

Vitamin B2as Riboflavin100 mg5,882%Riboflavin in Mega Stress 100 against 9,824 products100 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg100 mg

Higher than 96% of 9,824 products listing riboflavin (median 4 mg).

Vitamin B-3as Niacin/Niacinamide40 mg200%Niacin in Mega Stress 100 against 12,413 products40 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg40 mg

Higher than 71% of 12,413 products listing niacin (median 20 mg). 1.1 times the adult UL a day.

Vitamin B5as Pantothenic Acid100 mg1,000%Pantothenic Acid (Vitamin B5) in Mega Stress 100 against 10,060 products100 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg100 mg

Higher than 86% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Vitamin B6as Pyridoxine100 mg5,000%Vitamin B6 in Mega Stress 100 against 15,277 products100 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg100 mg

Higher than 96% of 15,277 products listing vitamin B6 (median 6 mg).

Vitamin B12as Hydroxocobalamin500 mcg8%

This amount is far outside what other labels list for vitamin B12, or disagrees with the label's own %DV: possibly a unit or transcription slip in the database. Check the label image on DSLD.

Biotin150 mcg50%Biotin in Mega Stress 100 against 9,447 products150 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg150 mcg

51% of 9,447 products listing biotin give more (median 200 mcg).

Folic Acidas Folacin400 mcg100%Folate in Mega Stress 100 against 7,022 products400 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.400 mcg

24% of 7,022 products listing folate give more (median 400 mcg).

Cholineas Choline Citrate100 mg18%Choline in Mega Stress 100 against 4,738 products100 mg per serving; the middle half of products list 18 mg to 100 mg, the median 40 mg.DV 550 mgUL 3,500 mg100 mg

Higher than 72% of 4,738 products listing choline (median 40 mg).

Inositolas CornInositol (Form: from Corn)100 mgInositol in Mega Stress 100 against 4,042 products100 mg per serving; the middle half of products list 10 mg to 80 mg, the median 30 mg.100 mg

Higher than 76% of 4,042 products listing inositol (median 30 mg).

Para-Aminobenzoic Acid100 mgPABA in Mega Stress 100 against 1,610 products100 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.100 mg

Higher than 86% of 1,610 products listing PABA (median 25 mg).

Lemon Bioflavonoid Complex250 mgFlavonoid in Mega Stress 100 against 2,343 products250 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.250 mg

Higher than 88% of 2,343 products listing flavonoid (median 50 mg).

Rice Bran concentrate100 mgRice Bran in Mega Stress 100 against 115 products100 mg per serving; the middle half of products list 90 mg to 500 mg, the median 200 mg.100 mg

63% of 115 products listing rice bran give more (median 200 mg).

Hepatrin Complex TM100 mg
Hepatrin Complex TMHepatrin Complex TM Note: providingno amount given
desiccated Liver50 mgLiver in Mega Stress 100 against 221 products50 mg per serving; the middle half of products list 50 mg to 1,000 mg, the median 250 mg.50 mg

74% of 221 products listing liver give more (median 250 mg).

Intrin50 mg

Source: NIH ODS Dietary Supplement Label Database, label 37741 (entered October 10, 2014), 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:

  • Its 100 mg of vitamin B1 (filed by NIH under thiamin) is higher than 94% of the 9,830 thiamin products that print an amount; 163 list more.
  • Its 100 mg of vitamin B2 (filed by NIH under riboflavin) is higher than 96% of the 9,824 riboflavin products that print an amount; 110 list more.
  • At 1 serving a day, the most its directions give, the label lists 40 mg of niacin, 1.1 times the adult Tolerable Upper Intake Level.
  • Its 100 mg of vitamin B6 is higher than 96% of the 15,277 vitamin B6 products that print an amount; 173 list more.

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 Mega Stress 100'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: Take one (1) tablet daily, preferably with food or as recommended by your health care practitioner.
Warnings
KEEP OUT OF REACH OF CHILDREN
TAMPER RESISTANT - DO NOT USE IF SEAL IS DAMAGED OR MISSING
Allergens and what it does not contain
GUARANTEED FREE OF: artificial flavor & color, dairy, preservatives, salt, soy, gluten, starch, sugar, wheat,
Storage
STORE IN A COOL, DRY PLACE

Source: label statements in DSLD label 37741.

What else is on the label?

Other ingredients: Vegetable Stearate, Vegetable Cellulose, Di-Calcium Phosphate, Pharmaceutical Glaze.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): ONLY NATURAL Est.1986.

How many labels does Mega Stress 100 have?

2 labels are on file under this name since October 10, 2014: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 37741 (current) Entered October 10, 2014 · off the market October 17, 2023 · 30 tablets · UPC 7-27413-00350-2
  2. Label 37740 Entered October 10, 2014 · off the market October 17, 2023 · 60 tablets · UPC 7-27413-00351-9

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

Who makes it?

The label names Only Natural, Inc. (manufacturer), Island Park, NY, U.S.A.. All Only Natural products.

Where next?