b12 injection how fast does it work Vitamin Injections and Weight Loss: Work? How Long Does A Vitamin

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Tablets just as effective Over-the-counter B12 tablets are a fraction of the cost of shots, and have been shown in a British-Canadian study to work just as well for most people, although some people with digestive conditions may have difficulty absorbing the vitamin in tablet form

Williams, A novel role for vitamin B12: Cobalamins are intracellular antioxidants in vitro, Free Radical Biology and Medicine, Volume 47, Issue 2, 15 July 2009, Pages 184-188, ISSN 0891-5849, J

DOSAGE AND ADMINISTRATION For Intramuscular administration: General: Twice daily 1 ml per 20 - 40 kg body weight for 3 days