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Brazil nuts, fish, and whole grains are excellent dietary sources of selenium

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Severe electrolyte imbalances have caused deaths

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Best overall: Thorne Vitamin B12 | Skip to review Best multivitamin with B12: Mindbodygreen Ultimate Multivitamin+ | Skip to review Best vegan: HUM Nutrition B12 Turbo | Skip to review Best liquid B12: Pure Encapsulations B12 Liquid | Skip to review Best gummy: OLLY Daily Energy Gummies | Skip to review Best whole-foods supplement: Garden of Life Vitamin Code Raw B12 Capsules | Skip to review Most affordable: Nature Made B12 Softgels | Skip to review Best allergen-free: Pure Encapsulations Methylcobalamin Capsules | Skip to review Best B complex vitamin: Nordic Naturals Vitamin B Complex | Skip to review Vitamin B12 is an essential dietary nutrient necessary for energy production and proper functioning of your nervous system, among other important roles

Other claims Recently, vitamin B12 injections and infusions have become popular among healthy people who dont appear to have a deficiency