Postpartum Vitamin Supplementation Guidelines

Essential Vitamins and Minerals

• The American College of Obstetricians and Gynecologists recommends that all breastfeeding women require 10 mcg/day (400 IU) vitamin D supplementation to ensure adequate vitamin D stores for both mother and infant and reduce the baby's risk of developing rickets 2
• The Endocrine Society recommends ≥1000 IU (40 mcg) daily to maintain serum 25-hydroxyvitamin D levels above 50 nmol/L 1
• Postpartum iron supplementation at 45-60 mg elemental iron daily is recommended to maintain ferritin within normal limits and prevent anemia 1
• 1200-1500 mg daily in divided doses (including dietary intake) is recommended to maintain parathyroid hormone within normal limits 1
• Lactating women require 4 mcg daily of vitamin B12, which can be given as 1 mg intramuscular injection every 3 months or 1 mg daily orally 1
• The National Institutes of Health recommends that lactating women require 0.4 mg daily of folic acid, particularly during breastfeeding 1
• Women with obesity (BMI >30) or diabetes should continue higher doses of 4-5 mg daily of folic acid 1
• Lactating women require 155 mg/day total of vitamin C (95 mg baseline plus 60 mg additional for lactation) 2
• 5000 IU daily in beta-carotene form only is recommended for lactating women, avoiding retinol form to prevent toxicity risk 1
• Additional requirements of 1300 mg retinol equivalent/day are recommended for lactation, related to transfer of retinol into breast milk 2
• Thiamine >12 mg daily is recommended for lactating women 1
• Copper 2 mg daily is recommended for lactating women 1
• Zinc 8-15 mg per 1 mg copper is recommended for lactating women 1
• Selenium 50 μg daily is recommended for lactating women 1
• Vitamin E 15 mg daily is recommended for lactating women 1
• Vitamin K 90-120 μg daily is recommended for lactating women (10 mg weekly orally if deficiency noted) 1

Special Populations

• Post-bariatric surgery women require intensive monitoring and higher supplementation doses due to malabsorption 1
• Women with malabsorptive procedures (RYGB, BPD/DS) are at higher risk for fat-soluble vitamin deficiencies (A, E, K) and require specialist center follow-up 1
• Case reports document severe vitamin B12 deficiency in exclusively breastfed infants born to mothers who underwent RYGB 3
• Women with obesity should continue higher folic acid doses (4-5 mg daily) postpartum 1

Monitoring Schedule

• Full blood count, serum ferritin, iron studies (including transferrin saturation), serum folate, serum vitamin B12 should be monitored every 3 months in early postpartum/breastfeeding women 1
• Prothrombin time/INR, serum vitamin D with calcium/phosphate/magnesium/PTH, serum protein and albumin, liver function tests, serum vitamin E, zinc, copper, and selenium should be monitored every 6 months in ongoing monitoring 1