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Factoring in research and development, clinical trials in human subjects and finally safety reviews, new drugs take an average of a decade or more to receive FDA approval, he said
Why B12 Shots Work Faster Than Oral Supplements For someone with normal digestion and a mild, diet-related deficiency, oral supplementation can work fine it just takes longer
But it's also dormant
It has been recommended that serum total homocysteine (Hcy) and methylmalonic acid (MMA) levels are more sensitive indicators of vitamin B12 status in pernicious anemia patients without any other disorders of vitamin B12 metabolism
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