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doi: 10.1007/s10517-006-0323-9
Results of curve fitting and threshold effect analysis After excluding participants with vitamin B12 1,000 pg/mL ( n = 15), a significant threshold effect was observed at 358.7 pg/mL
Some users find it harder to fall asleep or experience changes in sleep quality
Those with a deficiency may notice an increase in their level of energy after supplementation
Zhang C, Xie Y, Chen H, et al
1996;10:A143
