While most people can benefit from a B12 injection, certain groups of people may see more obvious benefits than others: People With Signs Of B12 Deficiency Any person with the signs or symptoms of a B12 deficiency should pay a visit to their doctor, but an injection may still provide them with benefits
Consequently, a deficiency in vitamin B12 can lead to anemia and neurological issues such as muscle weakness, cognitive decline, depression, fatigue, neuropathy, and stroke
The page lists two purity numbers: 99% in the specs and 98.5% on the badge
For vial-based microdosing, concentration matters more than vial size
The best strategy is to consume a balanced and varied diet that includes: Dairy products (milk, yogurt, cheese) Lean meats (especially liver) Eggs Nuts and seeds Green leafy vegetables (spinach, kale, broccoli) As reported by the National Institutes of Health Office of Dietary Supplements , the RDA for riboflavin is 1.3 mg/day for adult men and 1.1 mg/day for adult women [NIH ODS]
Bull Exp Biol Med 2006;142:356-359