A pragmatic alternative is to prepare smaller vials from your reconstituted stock and freeze them as single-use aliquots at 20C, minimizing repeated freeze-thaw exposure to your main vial
If you're not getting enough B12, you can experience anemia, fatigue, weakness, constipation, decreased appetite, weight loss, dizziness, lightheadedness, confusion, poor memory, soreness of your tongue and mouth, and tingling and numbness in your hands and feet, according to Harvard Health Publishing
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Many chronic illnesses are characterized by intense physical fatigue and low energy