Very serious side effects such as chest pain and difficulty breathing are rare
Sources of Vitamin B12 To enjoy the myriad benefits of Vitamin B12, its essential to include B12-rich foods in your diet
Check out my videos The Optimal Vitamin B12 Dosage for Adults and The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors which go into detail
This work was also supported by National Natural Science Foundation of China (No
It can be found in foods like leafy greens, liver, and beans or in supplements in the form of folic acid
labs looks like this: Normal range: 200 to 900 pg/mL (some labs use 160 to 950 pg/mL) Optimal range: 400 to 600 pg/mL Elevated: above 900 to 1,000 pg/mL (hypercobalaminemia) These ranges come from sources including UCSF Health and WebMD, though your labs specific cutoffs may differ