SPECIMEN #KIRKLAND
Verified
B_VITAMINSKirkland Signature
Vitamin B12 5000mcg Sublingual
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.
9.5/10
EXCEPTIONALMethylcobalamin 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.
1 ingredientTablets300 servings
Evidence
7.0
Dosing
10.0
SynergyN/A (single ingredient)
What We Like
- Methylcobalamin (active form, no conversion needed).
- Sublingual bypasses gut absorption barriers.
- 300 tablets (nearly 1 year supply).
- Costco bulk pricing.
Watch Out For
- 5000mcg is correction dose (1000mcg sufficient for maintenance).
- Single ingredient.
What We Analyzed
Verified Supplement Facts
Every dose checked against clinical research
We analyzed the actual supplement facts panel for this product. Every ingredient dose below was cross-referenced with published clinical trials to determine if it matches what studies actually use.
1 ingredients analyzed
Source: Official product page
Ingredient Breakdown
Clinical Adequate Underdosed Overdosed|Bar = % of clinical dose
IngredientDoseStatusvs. Clinical
In our database (click to learn more) Not yet reviewed
Our Analysis
Personalized Deep Analysis
See exactly how this fits your health profile. What works for you, what doesn't, and whether you're getting your money's worth.
Unlock with ProTaking other supplements too?
Check your full stack for interactions, redundancies, and gaps. Takes 30 seconds.
0 views