PlainVitamins

Mega B-100

by Nature's Plus · tablet or pill · 60 tablets

  • Off the market since February 2020 (NIH)
  • UPC 0 97467 01430 5
  • DSLD label 191083
  • Serving 1 tablet

Mega B-100 by Nature's Plus lists 11 ingredients, 11 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 vitamin B6. Its current label entered the NIH Dietary Supplement Label Database on April 25, 2019.

What is in Mega B-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 B-100: Supplement Facts rows against the market (DSLD label 191083, January 2026 release)
IngredientAmount% DVAmong products listing it
Thiamineas Thiamine Hydrochloride, Vitamin B1Thiamin (Form: as Thiamine HCl) (Alt. Name: Vitamin B1)100 mg6,667%Thiamin in Mega B-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).

Riboflavinas Vitamin B2100 mg5,882%Riboflavin in Mega B-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).

Niacinas NiacinamideNiacin (Form: as Niacinamide)100 mg500%Niacin in Mega B-100 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.

Vitamin B6as Pyridoxine HydrochlorideVitamin B6 (Form: as Pyridoxine HCl)100 mg5,000%Vitamin B6 in Mega B-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).

Folateas Calcium L-5-MethyltetrahydrofolateFolate (Form: as Calcium-L-5-Methyltetrahydrofolate)100 mcg25%Folate in Mega B-100 against 7,022 products100 mcg per serving; the middle half of products list 200 mcg to 400 mcg, the median 400 mcg.100 mcg

86% of 7,022 products listing folate give more (median 400 mcg).

Vitamin B12as CyanocobalaminVitamin B12 (Form: as Cyanocobalamin)100 mcg1,667%Vitamin B12 in Mega B-100 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 mcg33%Biotin in Mega B-100 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).

Pantothenic Acidas Calcium PantothenatePantothenic Acid (Form: as Calcium Pantothenate)100 mg1,000%Pantothenic Acid (Vitamin B5) in Mega B-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).

Inositol100 mgInositol in Mega B-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).

Cholineas Choline BitartrateCholine (Form: as Choline Bitartrate)42 mg8%*Choline in Mega B-100 against 4,738 products42 mg per serving; the middle half of products list 18 mg to 100 mg, the median 40 mg.DV 550 mgUL 3,500 mg42 mg

Higher than 52% of 4,738 products listing choline (median 40 mg).

Paba30 mgPABA in Mega B-100 against 1,610 products30 mg per serving; the middle half of products list 10 mg to 50 mg, the median 25 mg.30 mg

Higher than 53% of 1,610 products listing PABA (median 25 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 191083 (entered April 25, 2019), 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.
  • 86% of the 7,022 products that print an amount of folate list more than its 100 mcg of folate (median 400 mcg).

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
Directions: As a dietary supplement, one tablet daily, preferably with a meal.
Warnings
Keep out of reach of children.
Allergens and what it does not contain
Free from artificial colors and preservatives. Free from the common allergens yeast, wheat, soy and milk.
Gluten Free
Storage
Keep tightly closed in a cool, dry place.

Source: label statements in DSLD label 191083.

What else is on the label?

Other ingredients: Di-Calcium Phosphate, Stearic Acid, Hydroxypropyl Methylcellulose, Rice Bran, Magnesium Stearate, Watercress, Parsley, Pharmaceutical Glaze, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): Hypo-Allergenic; Quality Natural Supplements.

How many labels does Mega B-100 have?

2 labels are on file under this name since August 25, 2015: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 191083 (current) Entered April 25, 2019 · off the market February 20, 2020 · 60 tablets · UPC 0 97467 01430 5
  2. Label 49318 Entered August 25, 2015 · off the market February 28, 2022 · 90 tablets · UPC 0 97467 01440 4

DSLD also links this label to: Mega B-100 Balanced B-Complex (image difference, same product), Mega B-100 Balanced B-Complex (image difference, same product), Mega B-100 Sustained Release (image difference, same product).

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

Who makes it?

The label names Natural Organics Laboratories, Inc. makers of Nature's Plus (manufacturer), Amityville, NY. All Nature's Plus products.

Where next?