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Description
PL B-12 Intrinsic Factor Progressive LaboratoriesFactors for Support of B 12 Bioavailability Vitamin B12 is a water soluble vitamin needed for normal nerve cell activity, DNA replication, and production of the mood affecting 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
Factors for Support of B-12 Bioavailability
Vitamin B12 is a water-soluble vitamin needed for normal nerve cell activity, DNA replication, and production of the mood-affecting 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
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
Other Ingredients :
gelatin (capsule), rice flour, silica, maltodextrin.
Recommendations :
Take one capsule daily, or more, as directed by your healthcare practitioner.
If you are pregnant, nursing, or taking medication, consult your healthcare practitioner before use. Keep out of reach of children.
Servings:
60
| Ingredient | Amount | Daily Value |
|---|---|---|
| Folate [(6S)-5-methyltetrahydrofolic acid, glucosamine salt] Quatrefolic® | 800 mcg | 200% |
| Vitamin B-12 (as methylcobalamin) | 500 mcg | 8,333% |
| Biotin | 300 mcg | 100% |
| Intrinsic Factor | 20 mg | * |
| * Percent Daily Values (%DV) are based on a 2,000 calorie diet. | ||
| ** Daily Value (DV) not established. |
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4.3 ★★★★★
Based on 100 reviews
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Product Reviews
★★★★★ 5
Cute story!!
Format: Hardcover
Enjoyable little Valentines book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 2, 2026
★★★★★ 4
Sweet story
Format: Hardcover
Gave to a 9 year old grandson who has struggled with reading -- looked like a good choice. He seemed initially pleased.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 2, 2026
★★★★★ 5
Good book
Format: Hardcover
Kids love this series of books
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 5
Great book!
Format: Hardcover
Such a cute book! Good for ages 2 and up.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 16, 2026
★★★★★ 5
Perfect 2nd Birthday Gift, So Fun and Interactive!
Format: Board book
This book was such a fun gift for my niece’s 2nd birthday! She absolutely loved it from the moment she opened it.
The bright pictures in the classic Eric Carle style are beautiful and really grab little ones’ attention. The buttons are easy for small hands to push, and the animal sounds make it extra engaging and interactive. She had so much fun pressing the buttons over and over again and trying to copy the sounds.
It’s a great book for keeping toddlers entertained.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 22, 2026
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