Public Health Agency of Canada recommends that breastfed babies receive 10 mcg (400 IU) of liquid vitamin D every day beginning at birth. This is a supplement for the baby — a mother’s own multivitamin does not automatically replace the infant recommendation.
Why the distinction matters
The infant dose is specifically intended to help prevent vitamin D deficiency and rickets. Use a product formulated for babies and follow the label or advice from your healthcare professional.
Formula-fed babies
PHAC states that babies who are not breastfed generally do not need a separate vitamin D supplement because commercial infant formula contains vitamin D. If feeding is mixed, ask your healthcare professional what applies to your baby.
This page summarizes general public-health guidance. It is not a diagnosis or a personalized treatment plan.
Sources
Key takeaways
- Public Health Agency of Canada recommends 400 IU (10 mcg) vitamin D daily for breastfed babies from birth.
- The infant supplement is separate from the mother’s own vitamin.
- Use a baby product and follow the label carefully.
What this means day to day
Vitamin D drops are usually given in a very small volume, but products can have different concentrations. Read the bottle every time you switch brands so you know how many drops equal the recommended dose.
The reason for the infant supplement is simple: breastmilk alone may not provide enough vitamin D to reliably prevent deficiency and rickets. This recommendation is about the baby, not a judgement about the quality of breastmilk.
If your baby is partly breastfed and partly formula-fed, ask your healthcare provider what applies to your feeding pattern. Formula contains vitamin D, so the need for an additional supplement can depend on how much formula the baby receives.
A simple checklist
- Use a vitamin D product intended for infants.
- Confirm the concentration and dose on the label.
- Give the supplement consistently as directed.
- Keep the bottle away from children.
- Ask your baby’s healthcare provider about mixed feeding or any dosing question.
Common questions
How much vitamin D does a breastfed baby need in Canada?
The Public Health Agency of Canada recommends 10 mcg, or 400 IU, every day beginning at birth.
Does my postnatal vitamin replace my baby’s vitamin D drops?
No. The standard Canadian recommendation is a separate infant vitamin D supplement for breastfed babies.
What if my baby drinks formula too?
Ask your healthcare provider. Formula contains vitamin D, so the recommendation can depend on how much formula your baby drinks.
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