Cloudiness or haziness
We send you a kit to collect a small finger-prick blood sample from the comfort of your own home
By entering, you confirm you are 21 years or older and a qualified researcher acting in compliance with local regulations
Alcohol misuse reduces B12 stores
Seek medical attention promptly if you experience symptoms that could suggest serious underlying conditions, including: Unexplained weight loss or persistent fatigue Jaundice (yellowing of skin or eyes), abdominal pain, or swelling Easy bruising or bleeding , or unusual skin rashes Night sweats , fever, or enlarged lymph nodes Reduced urine output , significant swelling in legs or ankles Persistent itching without obvious skin cause These symptoms may indicate liver disease, haematological disorders, or renal impairmentconditions that can elevate B12 and require specialist assessment
Cyanocobalamin, while synthetic, offers unparalleled stability and cost-effectiveness