PlainVitamins

Mega B-100 Vitamin B Complex Timed-Release

by Quest · tablet or pill · 60 tablets

  • Off the market since October 2023 (NIH)
  • UPC 0 58371 21220 1
  • DSLD label 23987
  • Serving 1 tablet

Mega B-100 Vitamin B Complex Timed-Release by Quest lists 10 ingredients, 10 with an amount per serving of 1 tablet, such as 100 mg of thiamine, 100 mg of riboflavin, 100 mg of niacin and 100 mg of pantothenic acid. Its current label entered the NIH Dietary Supplement Label Database on July 25, 2013.

What is in Mega B-100 Vitamin B Complex Timed-Release?

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 B-100 Vitamin B Complex Timed-Release: Supplement Facts rows against the market (DSLD label 23987, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamineas Thiamine Hydrochloride100 mg8,333%*Thiamin in Mega B-100 Vitamin B Complex Timed-Release 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).

Riboflavin100 mg7,692%*Riboflavin in Mega B-100 Vitamin B Complex Timed-Release 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).

Niacinas Nicotinic Acid100 mg625%*Niacin in Mega B-100 Vitamin B Complex Timed-Release against 12,413 products100 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg100 mg

Higher than 88% of 12,413 products listing niacin (median 20 mg). 2.9 times the adult UL a day.

Pantothenic Acidas Calcium D-Pantothenate100 mg2,000%*Pantothenic Acid (Vitamin B5) in Mega B-100 Vitamin B Complex Timed-Release 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 Pyridoxine Hydrochloride100 mg5,882%*Vitamin B6 in Mega B-100 Vitamin B Complex Timed-Release 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).

Folateas Folic Acid1 mgFolate in Mega B-100 Vitamin B Complex Timed-Release against 7,022 products1,000 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.1,000 mcg

Higher than 93% of 7,022 products listing folate (median 400 mcg).

Vitamin B12as Cyanocobalamin100 mcg4,167%*Vitamin B12 in Mega B-100 Vitamin B Complex Timed-Release against 14,425 products100 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg100 mcg

Higher than 61% of 14,425 products listing vitamin B12 (median 36 mcg).

Biotin100 mcg333%*Biotin in Mega B-100 Vitamin B Complex Timed-Release against 9,447 products100 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg100 mcg

61% of 9,447 products listing biotin give more (median 200 mcg).

Cholineas Choline Bitartrate100 mg18%*Choline in Mega B-100 Vitamin B Complex Timed-Release 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).

Inositol100 mgInositol in Mega B-100 Vitamin B Complex Timed-Release 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).

* % Daily Value computed from the printed amount and the FDA Daily Value (21 CFR 101.9); the label prints none for that row.

Source: NIH ODS Dietary Supplement Label Database, label 23987 (entered July 25, 2013), 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 thiamin is higher than 94% of the 9,830 thiamin products that print an amount; 163 list more.
  • Its 100 mg of 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 100 mg of niacin, 2.9 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.
  • Its 1,000 mcg of folate is higher than 93% of the 7,022 folate products that print an amount; 183 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?

6 products list the very same ingredients; the nearest amounts come first.

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
Recommended Use: High potency source of B complex vitamins for the maintenance of good health. Recommended Dose (Adults): Take 1 tablet daily or as directed by a health care practitioner.
Warnings
KEEP OUT OF REACH OF CHILDREN.
DO NOT USE IF SEAL UNDER CAP IS BROKEN.
Risk Information: People sensitive to nicotinic acid may experience flushing of the skin that is generally mild and transient.
Allergens and what it does not contain
This product does not contain corn, dairy, egg, gluten, shellfish, soy, sulfites or animal derivatives.
No artificial colours, flavours or preservatives
Storage
STORE IN A COOL, DRY PLACE.

Source: label statements in DSLD label 23987.

What else is on the label?

Other ingredients: PABA, Calcium Phosphate, Magnesium Stearate, Cellulose, Silicon Dioxide, Stearic Acid, Glycerin, Hypromellose.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): PREMIUM - QUALITY ASSURED; {Recycle}; SunOpta A healthy products company.

How many labels does Mega B-100 Vitamin B Complex Timed-Release have?

One label is on file, entered on July 25, 2013.

  1. Label 23987 (current) Entered July 25, 2013 · off the market October 12, 2023 · 60 tablets · UPC 0 58371 21220 1

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

Who makes it?

The label names SunOpta Inc. (manufacturer), Acton, ON. All Quest products.

Where next?