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October 12, 2020 at 10:18 am
#2047
Ryann KippingKeymaster
You’re welcome!
Ideally, we’d want methylcobalamin since it is the active form of B12, but that wouldn’t be a total deal breaker for a prenatal. 500 mcg is rather high but there is no none toxicity for B12 (no upper limit has been set). Since it is a water-soluble vitamin, excess is excreted through urine. There is limited research that suggests excessive B12 supplementation in conjunction with high folate supplementation increases the risk of autism in offspring.
Originally posted as Ryann Kipping, RDN, The Prenatal Nutritionist