Effect Of Two Different Sublingual Dosages Of Vitamin B12 On Cobalamin Nutritional Status In Vegans And Vegetarians With A Marginal Deficiency A Randomized Controlled Trial

This 12-week study examined whether people following plant-based diets could correct vitamin B12 deficiency using two different amounts of sublingual (under-the-tongue) B12 supplements. Researchers compared a lower dose of 350 micrograms per week against the commonly recommended higher dose of 2000 micrograms per week in 40 vegans and vegetarians who had marginal B12 deficiency.

Both supplement doses were equally effective at restoring healthy B12 levels in the blood. The study tracked not just B12 levels, but also related markers like homocysteine and methylmalonic acid, which become elevated when B12 is low. Both groups saw improvements in these markers, indicating that their bodies were properly using the B12 from the supplements. Importantly, the lower dose worked just as well as the higher dose.

This finding matters for metabolic health because B12 deficiency can lead to serious problems including anemia, cognitive decline, nerve damage, and depression. For people following plant-based diets, B12 supplementation is essential since this vitamin is primarily found in animal products. The study suggests that taking smaller, more frequent doses may be more efficient than the traditional approach of taking large weekly doses.

From a clinical perspective, this research supports using lower-dose B12 supplementation protocols, which may be more cost-effective and potentially better absorbed. Healthcare providers can confidently recommend the lower dose for patients with marginal B12 deficiency, knowing it achieves the same therapeutic benefit as higher doses.