At the starting dose of 0.25mg per week, a single 5mg vial lasts 20 weeks, which is nearly five months
Decreased stomach acid production also provides an environment conducive to the overgrowth of anaerobic bacteria in the stomach, which further interferes with vitamin B 12 absorption (3)
While foods like grass-fed beef, dairy products and fish supply a good dose of vitamin B12, some people abstain from eating these foods or have a harder time absorbing and actually utilizing this nutrient due to digestive/metabolic limitations
Thus, elevated blood levels of homocysteine and MMA may both be indicators of vitamin B 12 deficiency
In an unregulated research chemical market, contamination rates ranging from 12 to 58% make vendor selection critically important
Individuals with medical conditions: Those with gastrointestinal issues like Crohns disease or celiac disease or individuals who have undergone bariatric surgery often struggle with absorption