b12 injection and covid vaccine Does Shot Help With Fatigue? Get Expert Advice Vaccines don't have to be

Read more: Liver disease symptoms, causes, and treatment When to contact a doctor about bright yellow urine Some causes of bright yellow urine may not need medical care such as mild, temporary dehydration

Each 1 mL vial contains 1000mcg of cyanocobalamin, a synthetic form of vitamin B12. It is a multiple-dose vial, meaning that it can be used for more than one injection

Fatigue, however, is a deeper, more pervasive sense of exhaustion that doesnt improve with sleep

Cyanocobalamin is stable, making it good for medicine

This is a common cause of B12 deficiency in the UK and is usually diagnosed by your general practitioner