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Oral Supplements (Tablets, Capsules, Sublingual) Oral supplements are the most popular way to get Vitamin B12

Stronger hair and clearer skin : Low B12 is linked to hair thinning and dull skin

Extreme fatigue Dizziness Depression Anxiety Short-term memory problems Confusion Headaches Tinnitus (ear ringing) Sore red tongue Painful numbness Tingling in the arms and legs Constipation Diarrhea Muscle weakness Muscle spasms Difficulty walking Poor motor skills Infertility Heart palpitations Feeling out of breath Can a Vitamin B12 Injection Lead to Overdose

On a standard U-100 insulin syringe, where 1 mL equals 100 units, this translates beautifully: 10mg is in 100 units (1 mL) 1mg is in 10 units (0.1 mL) 2mg is in 20 units (0.2 mL) This makes the math incredibly simple for measuring doses, which is why many researchers prefer it