Jarrow vs Thorne Methyl B12 1000 mcg (2026)
Jarrow Formulas Methyl B-12 1000 mcg Lemon and Thorne Vitamin B12 as Methylcobalamin 1 mg both deliver 1,000 mcg of methylcobalamin, the pre-methylated form of B12. The differences are delivery and certification: Jarrow is a lemon-flavored tablet, Thorne a capsule whose listing says NSF Certified for Sport (we did not find it in a public registry).
Informational comparison of label data and cost — not medical advice. Prices are per-serving figures from our last price check; formulas are each brand’s published Supplement Facts.
The numbers, side by side
| Jarrow Formulas Methyl B-12 1000 mcg Lemon | Thorne Vitamin B12 as Methylcobalamin 1 mg | |
|---|---|---|
| Form | Methylcobalamin | Methylcobalamin |
| Dose / serving | 1000 mcg | 1000 mcg |
| Serving size | 1 chewable tablet | 1 capsule |
| Servings / container | 100 | 60 |
| Third-party cert | None | NSF Certified for Sport |
| Price | $11.92 | $24.00 |
| Cost / day | $0.12 | $0.40 |
| Buy | Check price → | Check price → |
Prices are Amazon buy-box figures ÷ pack serving count, last reviewed October 5, 2026. Formula details are each brand’s published Supplement Facts panel.
The real difference
Both are methylcobalamin rather than cyanocobalamin, and both at 1,000 mcg. Methylcobalamin is the form already active in the body, which is why some people prefer it over cyanocobalamin, though at these doses absorption is dominated by passive diffusion regardless of form.
The practical difference is format and price. Jarrow is a lemon-flavored tablet, and Thorne is a swallowed capsule in the NSF Certified for Sport registry (listing #1811504, 60 capsules). At 1,000 mcg, absorption is mostly passive diffusion in either format.
Who each one is for
Choose Jarrow if you want the same 1,000 mcg of methylcobalamin at the lower cost per day, or you prefer a tablet.
Choose Thorne if you prefer a capsule or want a product in the NSF Certified for Sport registry (listing #1811504).
Our picks
1,000 mcg methylcobalamin as a lemon-flavored tablet. $0.12/day.
Same 1,000 mcg methylcobalamin in a capsule; in the NSF Certified for Sport registry (#1811504). $0.40/day.
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Frequently asked questions
Is Jarrow or Thorne B12 better?
Both deliver 1,000 mcg of methylcobalamin, so the active ingredient and dose match. Jarrow is a tablet at a lower cost per day; Thorne is a capsule in the NSF Certified for Sport registry (listing #1811504). Unless you prefer a capsule, Jarrow is the same dose of the same form for less.
Is methylcobalamin better than cyanocobalamin?
Methylcobalamin is the form already active in the body, so it needs no conversion, and it is the form both products here use. At 1,000 mcg the practical difference narrows because absorption at that dose is largely passive diffusion rather than the receptor-mediated route.
Does a tablet B12 absorb better than a capsule?
Not meaningfully. At 1,000 mcg, most absorption is passive diffusion, so the format matters little. Pick the one you will take consistently.
Related
- Methylcobalamin vs cyanocobalamin — which form and when it matters
- B12 dosage guide — RDA and what to know about 1,000 mcg
- All B12 products — ranked by cost per dose
Sources
- NIH Office of Dietary Supplements. “Vitamin B12 — Health Professional Fact Sheet.” ods.od.nih.gov
- NSF. “Certified for Sport” — what the program tests. nsfsport.com
- Product labels and Amazon pricing for both products, from our last price check.