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What we do know is that maintaining levels above 400 pg/mL ensures optimal red blood cell production critical for oxygen delivery during intense training
Symptoms of a vitamin B12 deficiency include fatigue, lacking energy, loss of appetite, headache, mouth ulcers, changes in vision, feelings of depression, and hindered mental capabilities
Used together, they can complement each other for a more complete result than either approach alone
This method ensures maximum absorption, which is particularly beneficial for people with absorption issues, digestive disorders, or severe deficiencies
Bechah, Y., Paddock, C
Be aware that B12 injections may cause muscle cramps or weakness
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