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Researchers first identified it decades ago and later discovered that levels tend to decline with age
Individuals with Gastrointestinal Disorders: Such as Crohns disease, celiac disease, atrophic gastritis, or those who have had gastric bypass surgery or other stomach/intestinal resections, which can interfere with B12 absorption
Meanwhile, individual users need practical guidance on starting doses, when to increase, how to manage breakthrough nausea, whether to reduce or push through side effects, and optimal maintenance dosing after achieving weight loss goals
Schuetz P, Muller B, Christ-Crain M, et al
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