does sublingual b12 work as well as injections Efficacy of different routes of vitamin supplementation for the treatment of patients with vitamin B12 deficiency: A systematic review and network meta-analysis How Quickly Does Vitamin B12

The deficiency was more severe than expected People with advanced B12 deficiency, especially with neurological symptoms, often feel rough at the start of treatment because the underlying problem was significant

Beef, turkey, chicken, oysters, salmon, and trout are all high in naturally occurring B12

A study from 2006 didnt find any difference in effectiveness between sublingual and oral vitamin B12 supplements (Yazaki, 2006)

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The effect of lipotropic injections on weight loss in overweight and obese adults

older adults risk low B12 as intrinsic factor declines