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That said, signs or symptoms that you may be low in vitamin B12 include: fatigue pale skin headaches symptoms of depression stomach issues difficulty focusing or concentrating pain or inflammation in the mouth or on the tongue burning or pins and needles feeling in your hands or feet muscle cramps vision changes Learn more: Signs and symptoms of B12 deficiency

Common additions in a B12 IV drip include: Vitamin C for immune support and antioxidant protection

AOD 9604 meets the first two criteria clearly

Steps: Cleanse your face with a gentle, pH-balanced cleanser

The 1 mg dose has direct human diabetes-trial activity. Below 1 mg is more speculative

Just note that glycerol will change the solvent environment (increasing viscosity and reducing freezing point), and ensure it doesnt interfere with your assay