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Description
Reactive control during task switching performance

Diagnostic accuracy of holotranscobalamin, methylmalonic acid, serum cobalamin, and other indicators of tissue vitamin B12 status in the elderly

No exact manufacturing location is provided While the website states that products are made in the USA, it provides no further information on manufacturing practices which is different than this vendor

B12-Methyl provides 1000 mcg of methylcobalamin, an active form of vitamin B12 that is more bioavailable than commonly used cyanocobalamin.*
