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Researchers comparing this page should review whether the listed supplier publishes COAs from recognizable laboratories, whether the product page shows the same vial size they need, whether the advertised price is before or after a discount, and whether the vendor clearly separates research-use products from any clinical or telehealth offering

The price listed is for one 1 mL vial of 1000 mcg/mL strength

According to the Office of Dietary Supplements at the National Institutes of Health, the average adult age 19 or older needs 2.4 mcg of B12 daily (or 2.6 mcg for pregnant women and 2.8 mcg for women who are breastfeeding)

Wnt signaling inhibitor characteristics according to bone status and physical activity levels in young and middle-aged premenopausal women