B12 supplements can come in a variety of forms — spray, liquid, capsule — which can make it difficult to know what to buy.

Your doctor will give you the right dosage of vitamin B12 supplement, especially if you will inject it. Taking too much can cause side effects like nausea, headache, dizziness, and, in some cases ...

Greg Vigna, MD Nitrous oxide, also known as laughing gas, can cause irreversible spinal cord injuries, paralysis, and B12 deficiency, oft ...