You may have heard it before: "A little bit of sun is good for the baby, it helps them get their vitamin D." It's advice passed down through generations — but what does the science actually say?

As a parent, it sounds like a natural, simple way to support your baby's health. But when it comes to babies, the risks of direct sun exposure outweigh the benefits.

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Vitamin D and your baby: what you really need to know

Vitamin D plays an important role in supporting your baby's bone development and immune health. And yes, our bodies do make vitamin D when exposed to sunlight. But when it comes to babies, the risks of direct sun exposure outweigh the benefits.

In the UK, the NHS recommends that breastfed babies from birth to one year receive a daily supplement of 8.5 to 10 micrograms (approximately 400 IU) of vitamin D. Formula-fed babies do not need a supplement unless they are having less than 500ml of formula a day.

In the US, the American Academy of Pediatrics (AAP) advises that all infants receive 400 IU (around 10 micrograms) of vitamin D per day, starting soon after birth. They also emphasise that deliberate sun exposure should not be used as a strategy for vitamin D intake in babies.

In Australia, health guidance reflects the country's high UV levels. The Cancer Council states that most children get enough vitamin D through incidental sun exposure, but also makes it clear that babies under 12 months should be kept out of direct sunlight when UV levels are 3 or above. Extended and deliberate sun exposure for vitamin D is not recommended for babies, due to their highly sensitive skin.

Even beyond the sunburn risk, relying on sunlight alone is not a reliable way for babies to get vitamin D. A study published in the Indian Dermatology Online Journal found that 90% of babies still had insufficient levels of vitamin D even after sun exposure. That's why experts recommend supplements instead.

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How much sun is safe for babies?

For babies under 6 months, the recommendation is clear: no direct sun at all. Their skin doesn't yet contain enough melanin to protect them from UV damage, and sunscreen isn't recommended at that age either.

For babies over 6 months, it's still important to limit sun exposure, especially between 10am and 4pm when UV rays are strongest. Protective clothing, wide-brimmed hats, and shade are key. And of course, don't forget that vitamin D supplements are still needed.

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Three is the magic number!

When the UV Index reaches 3 or above, it's time to take extra care. The World Health Organization recommends that everyone - babies, children and adults - seek shade and wear protective clothing once UV hits this level.

In the UK, UV levels are most often 3 or higher from March to October, even on cloudy days. In the US, states like Arizona, Nevada and southern California see UV levels over 3 for much of the year. In Australia, UV rarely dips below 3, with only a few months in southern regions falling under that threshold.

Checking UV levels is easy - most mobile weather apps show current and forecasted UV levels for the day, so you can plan your time outdoors accordingly and keep your baby protected when needed most.

Age	Sun exposure guidance	Vitamin D advice
Under 6 months	Avoid direct sunlight completely	Daily supplement of 8.5–10 micrograms (400 IU)
Over 6 months	Use shade, protective clothing, and avoid sun whenever UV levels are over 3	Continue supplementing unless advised otherwise

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How SnoozeShade can help

Getting out and about is important for both you and your baby. Fresh air, gentle movement, and a change of scenery are all part of a healthy routine. But keeping your baby protected from the sun is crucial - and that's where a good sunshade becomes essential.

Using shade and supplements together is the safest, most reliable way to support your baby's development - without the risks of UV exposure.