Is 1000 mcg of B12 per day too much? Exploring the safety and efficacy of high-dose supplements
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5 min read
The Recommended Dietary Allowance (RDA) for vitamin B12 for most adults is only 2.4 mcg, yet many supplements contain 1000 mcg or more. The question of whether **is 1000 mcg of B12 per day too much** requires understanding the complex absorption process rather than just comparing the numbers.