A review of research published in PMC (PubMed Central) regarding vitamin C supplementation during pregnancy indicates that regular vitamin C supplementation offers no significant benefits in preventing pregnancy complications and may even have some potential harms. Therefore, routine vitamin C supplementation during pregnancy is not recommended.
The main findings are as follows:
No support for routine use:
The evidence does not support routine vitamin C supplementation, either alone or with other supplements, for the prevention of fetal or neonatal death, poor fetal growth, preterm birth, or pre-eclampsia (a condition of high blood pressure during pregnancy).
Risk of placental abruption:
Some studies found that women taking vitamin C supplements may have a reduced risk of placental abruption (premature separation of the placenta from the uterine wall). However, it is unclear whether this effect was due solely to vitamin C or to the combination with vitamin E, as most trials administered both vitamins together.
Premature rupture of membranes (PROM):
Studies administering vitamin C alone showed a reduced risk of premature or term rupture of membranes (PROM). However, when vitamin C was given with vitamin E, the risk of term PROM increased, suggesting that vitamin E may be involved.
Other risks:
One study found an increased risk of abdominal pain with the combination of vitamins C and E, indicating that there may be harms associated with vitamin C supplements during pregnancy.
Natural sources are important:
Vitamin C is an essential nutrient during pregnancy that boosts the immune system, aids in iron absorption, and is crucial for the baby’s physical development. It should typically be obtained through a balanced diet that includes citrus fruits, tomatoes, potatoes, broccoli, and strawberries. Safe Upper Limit: The tolerable upper intake level (UL) for vitamin C in healthy adults is 2,000 milligrams per day. High doses are generally not toxic, but they can sometimes cause problems such as nausea or diarrhea.
Recommendation:
Before taking any supplements during pregnancy, it is important to consult your doctor or healthcare provider. They can provide appropriate guidance based on your individual health and dietary intake.
