If you live in Ireland, you're likely not getting enough vitamin D, and you're far from alone. Vitamin D supports normal immune function, calcium absorption, and healthy bones, muscles, and teeth.
The catch? Our bodies make most of it from sunlight, and here we don't get much of that for much of the year.
The Food Safety Authority of Ireland (FSAI) reports that 90% of adults on the island of Ireland don't get enough vitamin D from their diet alone.
So if you've been wondering whether it's worth paying attention to, especially in the darker months, the short answer is yes.
What Does Vitamin D Do?
Vitamin D is an essential nutrient with a few important jobs. It contributes to:
- Normal function of the immune system
- Normal absorption of calcium and phosphorus
- Normal blood calcium levels
- Maintenance of normal bones
- Maintenance of normal muscle function
- Maintenance of normal teeth
Vitamin D is best known for helping your body absorb calcium. This is why it’s closely linked to bone health.
Do I Need Vitamin D in Ireland?
For most of us, yes.
Your skin produces vitamin D when exposed to sunlight. However, because Ireland is so far north, the sun’s UVB rays aren't strong enough for much of the year to help your body make enough vitamin D.
The FSAI advises:
- Healthy teens and adults aged 12-65 with fair skin, who get some summer sun: take vitamin D daily from the end of October to March.
- Adults with darker skin, all pregnant women, and everyone aged 65 and over: take vitamin D year-round.
Everyone's needs are different, so if you're not sure what's right for you, chat with your GP or pharmacist.
How Much Vitamin D Per Day?
The FSAI recommends 15 micrograms (600 IU) of vitamin D a day for teens and adults aged 12 and over, including those over 65. Children need less, so check the FSAI guidance for younger ages.
Always stick to the dose on the label unless your doctor advises otherwise.
What Are the Benefits of Vitamin D?
Let’s look more closely at vitamin D's main benefits.
Immune Function
Vitamin D helps your immune system work properly. This is especially important in winter, when there is less sunlight, and we spend more time indoors.
Bones and Calcium Absorption
Vitamin D helps your body absorb calcium and phosphorus and keeps blood calcium levels normal. Calcium supports healthy bones and teeth, so vitamin D plays an important supporting role.
This matters even more during perimenopause and beyond, when protecting our bones and muscles becomes a real priority.
Muscle Function
Vitamin D helps maintain normal muscle function. As we get older, caring for our muscles and bones becomes even more important.
Teeth
Vitamin D also helps keep your teeth healthy by helping your body absorb calcium and phosphorus.
What Foods Contain Vitamin D?
Fewer than you'd think. Only a handful of foods contain meaningful amounts:
- Oily fish such as salmon, mackerel and sardines
- Egg yolks
- Fortified cereals
- Fortified milk and dairy alternatives
- Some fortified spreads
It’s best to get vitamin D from food, but for many people in Ireland, it’s difficult to get enough from diet alone.
What Are the Symptoms of Low Vitamin D?
Low vitamin D doesn't always come with obvious signs. When it does, the symptoms can be vague and easy to dismiss as something else. Possible signs include:
- Tiredness
- Muscle weakness
- Bone discomfort
- General aches
- Low mood
- Irritability in children
Having one or more of these symptoms does not mean you definitely have a vitamin D deficiency, as many things can cause them.
If you are concerned, talk to your GP or pharmacist instead of trying to diagnose yourself.
Vitamin D3 and K2: Why Take Them Together?
Vitamin D3 and K2 are often paired in supplements for good reason.
Vitamin D supports normal calcium absorption and blood calcium levels, while vitamin K helps maintain normal bones and blood clotting. Together, they make a simple, convenient daily combination.
Our Vitamin D3 & K2 capsules combine both nutrients in one daily capsule, designed for adults who prefer this form.
Vitamin D Spray vs Capsules
Capsule or spray? Don't overthink it. The best option is the one you'll actually remember to take.
Vitamin D Capsules
Capsules are a good fit if you already take supplements as part of your morning or evening routine. Our vitamin D3 and K2 supplements combine vitamin D3 with vitamin K2 in one convenient daily capsule.
Vitamin D Spray
Not a fan of swallowing tablets? If you're looking for a vitamin D spray in Ireland, our Vitamin D3 Sublingual Spray keeps it simple: one spray under the tongue each day and you're done.
One tip: spray it under your tongue, not just into your mouth, and follow the directions on the pack.
When Should I Take Vitamin D?
Take vitamin D whenever suits you; you can take it at any time.
Because it's fat-soluble, it helps to take it with a meal that contains a little fat.
What matters most is consistency. If you'll remember it at breakfast, take it at breakfast. If your supplements live beside the evening kettle, that works too.
Can You Take Too Much Vitamin D?
Yes. With vitamin D, more isn't better.
Taking too much over a long period can push your vitamin D levels too high, which can lead to too much calcium in your blood.
Stick to the recommended dose unless your doctor tells you otherwise.
Choosing the Best Vitamin D Supplement in Ireland
When you're comparing vitamin D supplements in Ireland, look at:
- How much vitamin D is in each dose
Whether you'd prefer a capsule or a spray
Whether you want vitamin D on its own, or a vitamin D3 and K2 supplement
How easily it fits into your day
Whether the dose suits your needs
A supplement only helps if you take it, so convenience matters.
Supporting Your Vitamin D Intake
Vitamin D supports normal immune function, calcium absorption, and normal bone and muscle function, as well as teeth. With our short winter days, it's a nutrient most of us in Ireland should consider.
Food is always the starting point. But when sunlight and diet fall short, a vitamin D supplement is a simple way to support your intake.
Frequently Asked Questions
What does vitamin D do?
Vitamin D supports normal immune function, normal absorption of calcium and phosphorus, normal blood calcium levels, and the maintenance of normal bones, muscle function, and teeth.
Do adults need vitamin D supplements in Ireland?
The FSAI recommends that healthy teens and adults aged 12–65 with fair skin take vitamin D daily from the end of October to March, if they get some summer sun. Adults with darker skin, all pregnant women and everyone aged 65 and over are advised to take it all year round.
How much vitamin D do adults need per day?
The FSAI recommends 15 micrograms (600 IU) a day for teens and adults aged 12 and over.
What is the difference between vitamin D and vitamin D3?
Vitamin D is the general name for the nutrient. Vitamin D3, also called cholecalciferol, is a common supplement form.
Is vitamin D3 and K2 a good combination?
They're a natural pair. Vitamin D supports calcium absorption and helps maintain normal bone health, while vitamin K helps maintain normal bone health and blood clotting. That's why they're so often found together in supplements.
Is vitamin D spray better than tablets?
Not automatically. A spray is simply a handy option if you don't like swallowing capsules or want something quick.
What are the signs of vitamin D deficiency?Low vitamin D is sometimes linked with tiredness, muscle weakness or bone discomfort, but the signs aren't specific. Your GP or pharmacist can tell you whether a test makes sense.
Can I take vitamin D every day?
Yes, most people take it daily. The right amount depends on your age, skin type, sun exposure and whether you're pregnant. Follow the recommended dose, and ask your GP or pharmacist if you're unsure.
