B12 liquid

Recent research has indicated that methylcobalamin, the active form of vitamin B₁₂, supports neurological function and nerve cell health. In studies, methylcobalamin has demonstrated the potential to support healthy cognitive and nerve function as well as memory and emotional well-being. Vitamin B₁₂ is also an important cofactor for energy production and plays a role in immune system health and healthy homocysteine metabolism

Pure Encapsulations recommends:
Methylcobalamin = 1-3 capsules per day, in divided doses, with meals.
B12 liquid = 1-3 ml daily, in divided doses, with meals, or as directed by a health professional.
B12 liquid 5,000 mcg = 1/2 to 1 ml daily, with a meal, as directed by a health professional.