How much vitamin D does my baby need in Ireland?
The rule, the reasons and the practicalities.
In short
In Ireland the HSE recommends 5 micrograms of vitamin D3 a day from birth to 12 months for breastfed babies and for bottle-fed babies taking under 300ml of formula daily. Babies on more than 300ml of formula a day don't need the drops.
- Most baby vitamin D drops sold in Ireland are 5 micrograms per drop, so it's one drop a day.
- Give it on a clean finger, the breast, in a bottle or on a soother, at the same time each day.
- Combination feeding? If your baby takes less than 300ml of formula a day, give the drops.
- If your baby spits it up, don't double-dose, just carry on the next day.
- Continue until the first birthday; premature babies get a different dose from their hospital team.
If you've had a PHN visit, you'll have been handed a small bottle of vitamin D drops and told to give 5 micrograms a day. Here's why, what 5 micrograms actually looks like, and the slightly awkward truth about parents and vitamin D.
How much vitamin D should I give my baby? The HSE recommendation
The HSE recommends 5 micrograms of vitamin D3 daily from birth to 12 months for breastfed babies, and for bottle-fed babies who are getting less than 300ml of formula a day.
Babies on more than 300ml of formula daily don't need the supplement because modern infant formula in Ireland is already fortified with vitamin D. If you're not sure how much formula your baby is taking, ask your public health nurse or GP.
Why do babies in Ireland need vitamin D drops?
Ireland sits between 51 and 55 degrees north. That means we get a decent dose of vitamin-D-generating sunlight roughly between April and September. During the other six months, the angle of the sun is too shallow for skin to make any.
Babies, of course, aren't out sunbathing anyway. Their skin shouldn't be in direct sunlight under six months. Older babies wearing sun cream get even less.
Breast milk is brilliant but it doesn't contain much vitamin D, which is why breastfed babies need the drops. Infant formula has vitamin D added, so babies taking more than 300ml a day don't need them.
How many drops of vitamin D is 5 micrograms?
Most baby vitamin D drops sold in Ireland are dosed at 5 micrograms per drop. So one drop per day. You can give it on a clean finger, on the breast, in a bottle, or on a soother. Whichever your baby tolerates.
Common brands available in Irish pharmacies include Nutramino D-Drops and various pharmacy own-brands. Any of them are fine if the dose works out to 5 micrograms per day.
Some general points:
- Give the drop at roughly the same time each day so it's easy to remember
- Continue until your baby's first birthday
- After 12 months, the HSE recommendation switches to dietary vitamin D where possible
- If your baby spits it up, don't double-dose. Just carry on the next day.
Does my formula-fed baby need vitamin D drops?
The HSE rule depends on how much formula your baby is getting:
- Breastfed babies: give the 5 micrograms daily, full stop. Breast milk doesn't contain enough vitamin D on its own.
- Bottle-fed on more than 300ml of formula a day: you don't need the drops. The formula is already fortified with vitamin D at sufficient levels.
- Bottle-fed or combination fed, on less than 300ml of formula a day: give the drops daily.
This catches a lot of parents out. If you're combination feeding, what counts is how much formula your baby takes: under 300ml a day, give the drops. If you're not sure, ask your public health nurse or GP.
Breastfeeding parents don't need to take extra vitamin D themselves for the baby's benefit, although their own bone health is a separate conversation worth having with your GP.
How do I remember whether I gave the vitamin D today?
Give it at roughly the same time each day and tick it off somewhere both parents can see. Here's the thing about vitamin D. It's not a feed. It's not a sleep. It's a daily quiet five-second thing, and that means it's the easiest thing in the world to forget.
You'll think you gave it. You can't remember if you gave it. Did your partner give it? Was that today or yesterday?
Lullagram has a built-in supplement preset for HSE vitamin D drops. You tap once when you give it, and you can look at the week at a glance to check you didn't miss a day. That's it. No more standing in the kitchen at 11pm trying to remember if you handed her the drop or just thought about it. It is free to try on Android, iPhone and web.
Which vitamin D3 drops should I use for my baby?
Any drops labelled vitamin D3 for infants that give 5 micrograms (200 IU) a day will do, and every pharmacy in Ireland stocks at least one. Check the label for two things: that it is D3, and how many drops make 5 micrograms, because some brands are one drop and others are several. You do not need a prescription, the PHN often hands you a bottle at the first visit, and there is no advantage in a higher dose for a healthy baby.
When should I ask the PHN about vitamin D?
Most parents don't need to, because one 5 microgram dose a day is simple to follow. The exceptions:
- Premature babies, where your hospital team will advise on a different dose
- Babies with specific medical conditions like malabsorption
- Anything that feels off. Ask, always.
The HSE has the full clinical guidance on its vitamin D for babies page.
Sources and guidance
This guide is written to be consistent with the official guidance below. It is general information for parents in Ireland, not medical advice. Links checked 17 September 2026.
Really good app. There are loads of additional extras outside the tracking but really helps if parents are taking night shifts and you want to see what has happened before you took over. The timing to let you know when the next feed potentially is also quite handy. loads of reports for the health nurse too. One stop shop for everything really.