Tag: 500 mcg b12

According to the National Institutes of Health, vitamin B12 has no established Tolerable Upper Intake Level (UL) due to its low potential for toxicity, with excess amounts typically excreted in urine. This fact prompts many to question if a dosage like 500 μg of B12 is too much, especially when the Recommended Dietary Allowance (RDA) for adults is just 2.4 μg.

While the Recommended Dietary Allowance for vitamin B12 is just 2.4 micrograms (mcg) for adults, supplement options often contain significantly higher amounts. This disparity can lead to questions about whether 500 mcg or 1000 mcg of B12 is more appropriate.

According to the National Institutes of Health, vitamin B12 absorption from oral supplements decreases significantly at higher levels. This critical fact helps explain why you might be wondering, 'Should I take B12 500 or 1000?'