Dr. Oz is recommending B12

Vitamin B12 offers a host of benefits and works in blood and nerve cells. Neurological function, such as brain, spinal and optic nerves, and proper blood cell functioning require vitamin B12. For the heart, vitamin B12 helps maintain healthy homocysteine levels in the blood. It also helps restore energy levels.

B-12 Deficiency May Increase Brain Shrinkage:

Vitamin B-12 deficiency may increase the risk of reduced mental function and increase the loss of brain volume in people, a new study reports.
Markers of vitamin B-12 status, but not B-12 levels themselves, were associated with lower scores on the cognitive tests and smaller total brain volume, researchers from the Rush University Medical Center in Chicago reported in Neurology.
This is not the first report of potential benefits of B-12 on brain shrinkage. In 2008 researchers from the University of Oxford reported that people with higher blood levels of the vitamin were six times less likely to experience brain shrinkage compared with people with lower vitamin levels (Neurology 71:826-832, 2008).
Vitamin B-12, also known as cobalamin, is only found in food of animal origin, including meat, milk and eggs.
For the Chicago study blood samples were taken from 121 people aged over 65. Four and one-half years after the blood sample collection, the participants had their brains scanned. MRI scans were performed to measure total brain volume and look for other signs of brain damage.
“Concentrations of all vitamin B-12-related markers, but not serum vitamin B-12 itself, were associated with global cognitive function and with total brain volume,” the researchers reported.

Neurology 77(13):1276-1282, 2011

Provides 1,000 mcg vitamin B12 per serving.
Servings per container: 59. Vitamin B1 (as thiamine mononitrate) 0.50 mg 35%. Riboflavin (vitamin B2) 0.85 mg 50% Niacin (as niacinamide) 10 mg 50% Vitamin B6 (as pyroxidine HCl) 1 mg 50%Vitamin B12 (as cyanocobalamin) 1,000 mcg 16,666% . Other Ingredients: Distilled water, sorbitol, vegetable glycerin, natural flavors, citric acid, sodium bicarbonate, malic acid, potassium sorbate.