Cyanocobalamin and pregnancy
Cyanocobalamin is safe to take in pregnancy.
You do not usually need to take vitamin B12 supplements when you're pregnant or breastfeeding, unless your doctor has advised you to. You should be able to get all the vitamins you need if you eat meat, fish, eggs, milk and dairy foods.
Cyanocobalamin and breastfeeding
It's OK to take cyanocobalamin if you're breastfeeding.
Vitamin B12 (including cyanocobalamin) is a natural part of breast milk. Cyanocobalamin does pass into breast milk, but it's unlikely to cause any side effects in your baby.
If you notice that your baby is not feeding as well as usual, or if you have any other concerns about your baby, talk to your midwife, health visitor, doctor or pharmacist as soon as possible.
Cyanocobalamin and fertility
There's no evidence to suggest that cyanocobalamin affects fertility in either men or women.