Progressive Laboratories B-12 Intrinsic Factor

Progressive Laboratories B-12 Intrinsic Factor

6 reviews
Sale price$28.50
Selection: 60 Capsules
 Free shipping on U.S. orders over $39  45 Day Return Policy


  • Progressive Laboratories B-12 Intrinsic Factor is a water-soluble vitamin needed for normal nerve cell activity, DNA replication, and production of the mood-affecting substance SAMe (S-adenosyl-L-methionine). Vitamin B12 acts with folic acid and vitamin B6 to control homocysteine levels.

Supplement Facts

Serving Size: 1 Capsule

Amount Per Serving ... %Daily Value

Folate ... 800 mcg ... 200%
[(6S)-5-methyltetrahydrofolic acid, glucosamine salt] Quatrefolic®

Vitamin B-12 ... 500 mcg ... 8333%
(as methylcobalamin)

Biotin ... 300 mcg ... 100%

Intrinsic Factor ... 20 mg ... *

*Daily Value not established.

Other Ingredients:

Gelatin (capsule), rice flour, silica, maltodextrin.


One capsule daily, or more, as directed by a health care professional.


Not to be used by pregnant or lactating women. 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.

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

Customer Reviews

Based on 6 reviews
Alline W.T.
Progressive Lab B-12 with Intrinsic Factor

I have been using this product for about 15 years. My body isn't able to sufficiently absorb nutrients from food. Since taking this, when I eat (my restricted diet due to allergies), I have energy. I also take regular B-12 pills but no longer have to give myself B-12 shots. I definitely recommend this product.

Gina H.
Very helpful for energy and mood

I take one of these every day and it has noticeably helped my energy level and mood.

Regina M.
Intrinsic Factor

We have seen amazing results using this product for a genetic condition that runs in our family!

Darlene L.

I have been taking this product for many years - thanks

Richard D.
Good Product

Well made hard to find item at a reasonable price. My Hg is always on the low side of normal. I have a slight case of Mediterranean anemia and the number has come up just slightly above normal after using this product with B12.

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