B-Complex Big 100® | GNC

Product Information



Replenishes B-vitamins lost during stress

Essential for energy production & carbohydrate metabolism


Nutrition Facts
Serving Size  1 Caplet(s)
Servings Per Container  250

Amount Per Serving     % DV

Riboflavin (Vitamin B-2) 100 mg   5882%
Niacin (as Niacinamide) 100 mg   500%
Vitamin B-6 (as Pyridoxine Hydrochloride) 100 mg   5000%
Folic Acid 400 mcg   100%
Vitamin B-12 (as Cyanocobalamin) 100 mcg   1667%
Biotin 100 mcg   33%
Pantothenic Acid (as Calcium d-Pantothenate) 100 mg   1000%

Thiamin (Vitamin B-1) (as Thiamin Mononitrate)  100 mg   **
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.
Store in a cool, dry place away from light.
Distributed by: General Nutrition Corporation Pittsburgh, PA 15222


4.6 / 5.0
18 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
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
4 months ago
Products are delivered safely. Everything goes well at present.
June 18, 2018
6 months ago
To strong I am cutting in half
May 13, 2018
7 months 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
10 months ago
Seems to be working well
October 22, 2017
1 year ago
Like This Product
I have been using this product for more than a year and I really like it!
October 15, 2017
1 year ago
Old Reliable
Have used it for years v
August 27, 2017
1 year ago
Awesome B Mix
Tough to beat this Vitamin B mix (B-1, B-2, B-6, B-12) all in one pill. Vitamin B has huge benefits and we often don't get enough in our daily diets given how bad processed food has gotten these days. GNC product so it's been highly tested and run through a million quality checks. Good addition to vitamin cabinet.
May 4, 2017
Excellent. Been taking this or equivalent for many years. When I feel a cold coming on, I take one in morning and one before bed and it usually goes away. Wife has the same experience.
February 24, 2017
Broad range of the B family
I generally take at least one every day. Been doing that for years and feel just fine. I always take with 2K of Vitamin C to help with absorption. Especially helpful if you drank a few too many the night before. Replaces the vitamins you lost.
November 23, 2016
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Browse 6 questions Browse 6 questions and 8 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.
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.
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.
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.