New research from UC San Francisco suggests that the current recommended levels of Vitamin B12 may not be sufficient for preventing cognitive decline in older adults. A study found that even those with levels considered healthy showed signs of cognitive deficiency and brain damage, indicating a need to revise these standards. New research from UC San Francisco suggests that the current recommended levels of Vitamin B12 may not be sufficient for preventing cognitive decline in older adults. A study found that even those with levels considered healthy showed signs of cognitive deficiency and brain damage, indicating a need to revise these standards. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle