If you notice any of the following, you may be deficient in vitamin B12: Pale or jaundiced skin Weakness and fatigue Nerve damage that feels like pins and needles Changes in balance, coordination and the way you walk A swollen tongue and mouth sores Shortness of breath and dizziness Blurred vision Brain disorder like depression and dementia High body temperature Signs That a B12 Injection Could Be Right for You There are many people who can improve their health and well-being with vitamin B12 injections, especially under the following circumstances
doi:10.1007/s00114-016-1362-3
Frontiers in Reproductive Health, 7
May help with type II diabetes: A study showed that patients with type 2 diabetes had lower levels of glutathione in their blood when compared with a non-diabetic control group
But combining peptides can increase the chance of side effects like higher cortisol and prolactin
When, in the past, monitoring of symptoms had been done poorly, there may be some people who do not need parenteral B12 supplementation