Methylcobalamin at 5000mcg in sublingual form. This is 5x the optimal dose, which is fine since B12 has no established upper limit and excess is safely excreted. Active methylcobalamin form plus sublingual delivery makes this ideal for anyone with absorption issues, older adults, or those on metformin.
The set is generated, never written by the brand.
Kirkland Signature Vitamin B12 5000mcg Sublingual: the formulation holds up. Lead: Vitamin B12 at 5000 mcg. Methylcobalamin at 5000mcg in sublingual form. Clinical dose on the primary, and the panel holds together.
300 sublingual methylcobalamin tablets at Costco pricing. Active B12 form, sublingual delivery, nearly a year supply. If you're vegan, over 50, or on metformin, this is the B12 to grab on your Costco run.
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This read comes from the product's own supplement facts panel. Every dose was cross-referenced with published clinical trials to see whether it matches what the studies actually used.

