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

For teenagers and adults, the injection is administered into the deltoid muscle of the upper arm, a common site that allows for efficient absorption of the vaccine into the system while minimizing injection site pain
Rather than increasing your dose, reduce alcohol intake during your cycle to maximize healing outcomes
Allergic Reactions Though rare, some people may have an allergic reaction to the components in the B12 injection
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