Jarrow Formulas Methyl B-12 5000mcg
by Jarrow Formulas
"Methylcobalamin B12 lozenge — 5000mcg active form B12 with sublingual absorption bypassing digestive issues"
Overview
Jarrow Formulas Methyl B-12 provides 5000mcg of methylcobalamin — the active, coenzyme form of vitamin B12 that requires no conversion in the body. The lozenge format dissolves under the tongue for sublingual absorption, bypassing the digestive system entirely. This is critical because B12 absorption requires intrinsic factor (a protein produced by stomach cells), and many people — especially those over 50, those with pernicious anemia, or those on PPIs — have impaired intrinsic factor production. Sublingual delivery ensures absorption regardless of digestive function.
Key Ingredients
| Ingredient | Amount |
|---|---|
| Methylcobalamin (Active B12) | 5000 mcg |
Pros & Cons
What We Like
- Methylcobalamin (active form, no conversion needed)
- Sublingual absorption (bypasses digestion)
- 5000mcg (therapeutic dose)
- Cherry flavor (pleasant taste)
- 15,000+ Amazon reviews
What Could Be Better
- Must dissolve under tongue (takes 2-3 min)
- Only 60 lozenges
- 5000mcg may be excessive for some
- Contains mannitol and xylitol
Who Is This For?
Best For
- MTHFR mutation carriers
- Those with B12 absorption issues
- Vegetarians and vegans
- Those over 50 (declining intrinsic factor)
Not Ideal For
- Those who prefer capsules
- Those with adequate B12 levels
- Those who dislike lozenge format
Our Verdict
Jarrow Methyl B-12 5000mcg is the gold standard methylcobalamin — active form, sublingual delivery, and therapeutic dosing. For MTHFR carriers and those with absorption issues, this is the B12 to choose. The cherry flavor makes the sublingual experience pleasant.