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Progressive Labs B-12 Intrinsic Factor 60 caps

SKU 400
Original price $26.30 - Original price $26.30
Original price
$26.30 - $26.30
Current price $26.30

Vitamin B12 is a water-soluble vitamin needed for normal nerve cell activity, DNA replication, and production of the mood-supporting substance SAMe (S-adenosyl-Lmethionine).* Vitamin B12 acts with folic acid and vitamin B6 to control homocysteine levels.

Absorption of vitamin B12 is reduced with increasing age. Some research suggests that elderly people may benefit from 10 to 25 mcg per day of vitamin B12. One study of elderly people with vitamin B12 deficiency suggested that as much as 500 to 1,000 mcg of vitamin B12 per day might be necessary to achieve optimal vitamin B12 status. Vitamin B12 status was measured in this study using a sensitive laboratory test (the plasma methylmalonic acid concentration).

Supplementation with B-12 Intrinsic Factor:

  • Supports nervous system health*
  • Supports red blood cell production*
  • Supports energy*
  • Supports metabolism of fats and carbohydrates*
Serving Size:1 Capsule
Servings Per Container:60

Amount Per Serving
Folate [(6S)-5-methyltetrahydrofolic acid, glucosamine salt] QuatrefolicAmount Per Serving:800 mcg
Vitamin B-12 (as methylcobalamin)Amount Per Serving:500 mcg
BiotinAmount Per Serving:300 mcg
Intrinsic FactorAmount Per Serving:20 mg
Other Ingredients:
Gelatin, rice flour, silica, maltodextrin


We work to ensure that product information is correct; however, brands may make changes to products from time to time, and actual product packaging and materials may contain more and/or different information than that shown on our website. Please consult all labels, warnings, and directions prior to using or consuming products for the most accurate product information.

  • Wheat Free
  • Soy Free
  • Yeast Free
  • Sugar Free
  • Salt Free
  • Corn Free

One capsule daily, or more, as directed by a health care professional. Sold only for dispensing by a licensed health care professional.

Not to be used by pregnant or lactating women.

This product is made without sugar, salt, wheat, corn, yeast or soy derivatives.

Tamper evident band around cap and seal on bottle. Do not use if either seal is broken or missing. Keep out of reach of children.

Customer Reviews

Based on 21 reviews
Pawel Kurzelewski

Progressive Labs B-12 Intrinsic Factor 60 caps

It works!!!

If you are lacking intrinsic factor, ordinary vitamin B12 doesnt work, which was my case. After taking this for 3 days I felt a world of difference!! My leg and foot pain was gone and I could walk without limping! It makes a huge difference for me! I highly recommend it!!!

Great value

Product contains a good amount of B12 as well as the intrinsic factor required for proper absorption of B12 at a reasonable price. I am looking forward to seeing whether or not my Hemoglobin has hit normal range. I use this product for a case of mild Mediterranean anemia.

I notice a difference!

I've been using this product for two weeks and I notice a difference in energy levels!

B-12 Vitamins

Great product. Works perfectly. Company is terrible about shipping the product on time.