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Years ago, I started taking a vitamin B12 supplement

doi: 10.18632/oncotarget.2034 191 DasSShuklaNSinghSSKushwahaSShrivastavaRJA

Vitamin B12 Deficiency The exact prevalence of Vitamin B12 deficiency remains unknown, but recent studies estimate between 1% and 20% of American adults have lower than optimal levels

It has shown promise as a cognitive enhancer and potent neuroprotectant

Lima L, Arce V, Tresguerres JA, Devesa J

News Release September 27, 2012 ConsumerLab.com Reveals How Much Caffeine is in Energy Drinks -- Also Finds Some Drinks and Dietary Supplements Don't Contain Claimed Amounts of B Vitamins White Plains, New York September 27, 2012 Energy shots and drinks are promoted to keep you alert and energized, attributing their effects to special formulas often "packed with B vitamins and nutrients to make it last," as a commercial for 5-hour Energy proclaims