Skipping a day or not following directions for how to take the medication has consequences
Dose Range: Standard maintenance 500 IU per injection (1,500 IU/week)
[152] Healthcare practitioners at clinics and spas prescribe versions of these intravenous combination products, but also intramuscular injections of just vitamin B 12

Reasons for fatigue Fatigue stems from physical or mental factors, including things like: Metabolic conditions such as diabetes, kidney disease, Cushing syndrome, and thyroid conditions Mental health issues such as depression, stress, eating disorders, anxiety, and burnout Cardiovascular conditions affecting blood flow, such as arrhythmias, heart disease, and heart failure Medications such as antidepressants, antihistamines, steroids, statins, and sedatives Sleep problems due to insomnia, narcolepsy, jet lag, and sleep apnea Chemical imbalances due to too little or too much of various essential nutrients, vitamins, and minerals Facts about B12 deficiency Also referred to as cobalamin deficiency and named after the scientific term for this water-soluble nutrient, a B12 deficiency can result from low dietary intake or from your body not absorbing the vitamin properly

Common sites include: Lower abdomen (most common) Upper thigh Upper arm Pinch a fold of skin, insert the needle at a 45-degree angle, and inject slowly over 2-3 seconds
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