B-Complex Big 100® | GNC
Vegetarian Vegetarian

GNC B-Complex Big 100®


Item # 055102
Vegetarian Vegetarian

Product Information



  • Replenishes B-vitamins lost during stress*
  • Essential for energy production & carbohydrate metabolism*


Nutrition Facts
Serving Size  1 Caplet(s)
Servings Per Container  100

Amount Per Serving     % DV

Vitamin B-12 (as Cyanocobalamin) 100mg   1667%
Biotin 100mcg   33%
Pantothenic Acid (as Calcium d-Pantothenate) 100mg   1000%
Thiamin (Vitamin B-1) (as Thiamin Mononitrate) 100mg   6667%
Riboflavin (Vitamin B2) 100mg   5882%
Niacin (as Niacinamide) 100mg   500%
Vitamin B-6 (as Pyridoxine Hydrochloride) 100mg   5000%
Folic Acid 400mcg   100%

Choline Bitartrate  100 mg   **
Inositol  100 mcg   **
Para-Aminobenzoic Acid (PABA)  30 mg   **

** Daily Value (DV) not established.
Other Ingredients
Label (click image to enlarge)

How To Use

As a dietary supplement, take one caplet daily
Keep out of reach of children.

Hors de la portée des enfants.
Distributed by: General Nutrition Corporation Pittsburgh, PA 15222

Replenish B Vitamins With GNC B-Complex Big 100

Each vegetarian tablet provides 100 milligrams each of vitamins B1, B2, B3, B5, and B6, as well as 100 micrograms of vitamin B12 and biotin and 400 micrograms of folic acid.

GNC B-Complex Big 100 Dietary Supplement

B vitamins help support metabolic processes in the body. They are essential for carbohydrate metabolism and energy production.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.


4.7 / 5.0
24 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
I’ve been using this for years and cannot love without
July 9, 2019
1 week ago
Good one for tingling and numbness sensation of periphery.
May 14, 2019
3 months ago
Excellent B-Complex
Excellent - it's the best B- Complex vitamin that I've tried.
May 7, 2019
3 months ago
Energy and healing power
B as always helped me build Energy. Also good for my liver.
March 19, 2019
1 year ago
Nice suport
Nice support for rumners and other Sports
January 31, 2019
5 months ago
The purest, best ,and best priced ever. I have used this product for 20 years!
January 4, 2019
7 months ago
Great for energy needs and metabolism function.
This Vitamin B complex Big 100 is very effective for increasing energy levels and for dealing with stress.
August 25, 2018
11 months ago
Products are delivered safely. Everything goes well at present.
June 18, 2018
1 year ago
To strong I am cutting in half
May 13, 2018
1 year ago
Seems OK.
It's too soon to tell if they are doing any good. I like the GNC brand of products and that I could find the strength my doctor said I needed.
February 8, 2018
1 year ago
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 8 questions Browse 8 questions and 9 answers
Why did you choose this?
GNC Store
Friend's recommendation.
h u on Apr 9, 2015
Friend's recommendation.
h u on Apr 9, 2015
this is part of my heart healthy regiment
m l on Apr 7, 2015
this is part of my heart healthy regiment
m l on Apr 7, 2015
Does this product contain Gluten? or Wheat?
A shopper on Apr 22, 2016
BEST ANSWER: GNCBig 100 is a good combination of B-Complex vitamins. I have used it to overcome B vitamin deficiency effectively.
l am a Chinese.could you send the products to my Chinese address if I buy some products here?
A shopper on Jun 3, 2016
how big are this tablets? are they difficult to swallow?
A shopper on Jan 17, 2017
BEST ANSWER: The tablets are what I'd call medium/large. They are smaller than the GNC woman's ultra mega vitamin pills, but about twice the size of a regular Advil.
My B12 vitamin level is too low. My doctor told me to start taking an over the counter B12 vitamin with at least 1000 mcg. The label on GNC B-Complex Big 100 isn't clear whether or not it has B12 1000 mcg per tablet. It exceed the daily requirement. Does it have at least 1000 mcg per tablet? If so, how many mcg per tablet? Thank you, Pat
A shopper on Jun 22, 2013
BEST ANSWER: No, it does not provide 1000 mcg per tablet, each tablet only contains 100 mcg of B12.
is it okey to take 100 mg of niacin in GNC B-complex, as far as i know 35 mg. per day is the recommended amount in an individual?
charito on Feb 21, 2018
BEST ANSWER: I am neither a health care provider, nutritionist, dietary consultant, or any other qualified professional. In addition to the niacin in GNC Mega Men multivitamin, the additional niacin in GNC Big 100 has not caused me any issue.
You may wish to consult with a professional if you have concerns or experience distress while taking Big 100.
Can I use GNC B-Complex Big 100 if I am taking Caduet (amlodipine/atorvastatin)
I'm not sure if I can mix atorvastatin with niacinamide

I hope you can help me

Thank you in advance
A shopper on Jun 20, 2013
BEST ANSWER: Since you are being treated for a medical condition (prescribed medication) you need to get the specific permission of your doctor before using GNC B-Complex Big 100. They can provide accurate information about interaction risks.
Does GNC B-Complex Big 100® suitable for child 11 years old?
Penny L on Jun 21, 2019
Will this add volume to edjaculation?
A shopper on Jun 12, 2019