Vitamin D: Dosage & Safety in Pregnancy

Pregnant or breastfeeding and wondering whether — and how much — extra vitamin D you should be taking? Short answer: yes, in most cases it makes sense, but this isn't a time to experiment with the amount. Here are the numbers that actually matter: the recommended daily amount, the blood level that determines your amount, and why you shouldn't set the dosage on your own. By the end, you'll know exactly where you stand — and what to bring up with your midwife or OB-GYN.

What Is Vitamin D?

Vitamin D isn't really a classic vitamin at all. Your body makes most of it itself, as soon as UVB light hits your skin — cholecalciferol, or vitamin D3, forms directly beneath the surface. Only a small part comes from food, like oily fish or eggs. During the darker months and with little time outdoors, most people's own production falls short — pregnant and breastfeeding women included.

How Does Vitamin D Work in the Body?

In the body, vitamin D behaves more like a hormone than a classic vitamin. Vitamin D contributes to the normal absorption and utilisation of calcium and phosphorus. Vitamin D contributes to the maintenance of normal bones. Vitamin D contributes to the maintenance of normal teeth. That's especially relevant during pregnancy, since your body is also supplying the building blocks for your baby's developing skeleton — your calcium metabolism is essentially running two job sites at once. Vitamin D contributes to the normal function of the immune system. Vitamin D contributes to the maintenance of normal muscle function. During pregnancy, some of your vitamin D passes to your baby through your bloodstream — so your own supply is, in a sense, the foundation for your baby's. After birth, something similar applies through breast milk, though it naturally contains only small amounts of vitamin D. That's one reason breastfed babies in Germany are typically prescribed their own low-dose vitamin D by their pediatrician, regardless of what you take yourself. For breastfeeding itself, we have put together a nursing complex called MAMASMILCH: fenugreek seed extract, fennel, omega-3, choline, iron, folic acid and vitamin B12 in a vegan capsule (more below).

Who Should Pay Attention to This Right Now?

Not every pregnant woman automatically needs a vitamin D supplement — it depends on your individual levels. Pay particular attention if your pregnancy falls in the autumn or winter months, if you spend most of your working hours indoors, if your skin is usually covered, or if you have a darker skin tone. If you eat a vegan diet, one of the few notable food sources of vitamin D — oily fish — is off the table too. And if you've become pregnant again shortly after a previous pregnancy or period of breastfeeding, your stores may not have fully rebuilt yet. In any of these cases, the odds are higher that your own production isn't keeping up. But certainty doesn't come from guessing — it comes from a blood test, which your OB-GYN can run as part of your regular prenatal checkups.

Intake & Dosage

For adults without adequate natural production, the estimated requirement is 20 micrograms of vitamin D a day, or 800 IU — and that figure doesn't change during pregnancy or breastfeeding. The German Nutrition Society sets the exact same reference value for both groups as for every other adult. How much you need beyond that is shown by your blood level. Have your 25-OH-D value measured and set the amount accordingly. A study of pregnant women who received 400, 2,000, or 4,000 IU of vitamin D3 daily from weeks 12 to 16 onward reported no adverse events caused by the vitamin D at any of these amounts. With 4,000 IU, most women reached a sufficient blood level. That is no licence to go it alone, but a reason to take your blood level seriously.

How you take it often matters more than the number alone: a low daily dose is preferable to a single high-dose bolus. High-dose depot supplements, designed for convenient dosing every few days, generally don't belong in your own routine during pregnancy — they're for explicit medical direction only. That also applies to our own Vitamin D3 Depot + K2Pure® with 5,000 IU per tablet: according to its product page, it is not suitable for pregnant or breastfeeding women, children, or adolescents. The smartest approach is this: get your vitamin D level checked, discuss the result with your OB-GYN or midwife, and agree together on the right product and exact amount. Don't take a vitamin D supplement on your own during pregnancy or breastfeeding at a dose higher than the general daily recommendation — checking in with your OB-GYN or midwife isn't a box-ticking formality here, it's genuinely the first step.

A practical tip for absorption: vitamin D is fat-soluble, so your body absorbs it best alongside a meal that contains some fat — buttered toast or a bit of avocado at breakfast, say, rather than taking it plain on an empty stomach. Anchoring it to a fixed meal also helps you remember to take it during what's already an eventful time.

What to Look for When Buying

Once you've talked it through and are choosing a product, the form makes a real difference. Vitamin D3 (cholecalciferol) is absorbed and used more reliably by the body than plant-based vitamin D2 — and vegan D3 from lichen still gives you that more usable form. Look for a dose per tablet or per drop that lines up exactly with the daily amount you've agreed on: drops are often easier to fine-tune than fixed-dose capsules. With drops, it's also worth checking the carrier oil — since vitamin D is fat-soluble, it needs an oil carrier for your body to absorb it well in the first place. Steer clear of combination products that bundle vitamin D with a long list of other high-dose ingredients just because it sells well — right now, fewer micronutrient sources matters more than a bigger label. And independent lab testing for purity and actual content isn't a nice bonus at this stage — it's a baseline requirement. With us, every batch is independently lab-tested. If you agree on extra magnesium with your OB-GYN or midwife, you will find our magnesium bisglycinate: 360 mg of elemental magnesium in three capsules, chelated, gentle on the stomach, vegan.

An Honest Take

Vitamin D deficiency during pregnancy is far from rare — especially in the darker months, a large share of the population falls below the recommended levels, pregnant or not. That doesn't mean every woman automatically needs to supplement, or that more is automatically better. Research on very high doses specifically during pregnancy is thin and inconsistent — one more reason to stick with the established daily amount rather than swing to either extreme. Most women with low levels notice nothing in everyday life at first — which makes it trickier to catch, but also less dramatic than some scare-mongering articles online would have you believe.

The only way to really know is a blood test. It beats every guess, every gut feeling, and every blanket piece of advice from the internet — including this article. Five minutes of drawing blood is worth more than any amount of uncertainty.

Matching Products from Scheunengut

We do not carry a low-dose daily vitamin D supplement specifically for pregnancy. Our Vitamin D3 Depot + K2Pure® (5,000 IU per tablet, one every 5th day) is not suitable for pregnant or breastfeeding women, children, or adolescents. The first step is the blood test with your OB-GYN or midwife anyway.

For breastfeeding we put together MAMASMILCH. Per daily dose of three capsules it contains 900 mg of fenugreek seed extract, 150 mg of fennel, 450 µg of folic acid, 19.8 mg of iron, 5.4 µg of vitamin B12 and about 70 mg of choline, plus omega-3 with DHA. Folic acid contributes to normal blood formation. Vitamin B12 contributes to the normal function of the nervous system. Iron contributes to the reduction of tiredness and fatigue. The capsule shell is vegan, free of additives, colorings and fillers, made in Germany and lab-tested batch by batch. As with any supplement at this time, you agree on it with your OB-GYN or midwife first.

Magnesium bisglycinate fits alongside: magnesium contributes to normal muscle function and contributes to the maintenance of normal bones. Scheunengut has existed since 2012, without investors and with a focus on pure raw-material quality.

Frequently Asked Questions (FAQ)

How much vitamin D can I take during pregnancy?

The recommended amount is 20 micrograms, or 800 IU, per day if your body isn't making enough through sun exposure alone, the same guideline that applies to all adults. How much you need beyond that is shown by your blood level (25-OH-D). Discuss your exact dosage with your OB-GYN or midwife.

Is vitamin D even necessary during pregnancy?

That depends on your individual levels, so there's no one-size-fits-all answer. If you get little sun, spend most of your time indoors, or eat a vegan diet, your risk of insufficient levels is higher — a blood test gives you certainty, not guesswork. If you're currently spending plenty of time outdoors during sunnier months, your body's own production may already be enough.

Can vitamin D harm the baby?

The amount belongs in medical hands: measure your blood level, set the dose accordingly, re-test later. In a study of pregnant women who received up to 4,000 IU of vitamin D3 daily, no adverse event was attributed to the vitamin D. High-dose depot supplements such as our Vitamin D3 Depot + K2Pure® are not suitable for pregnant women unless a doctor explicitly decides otherwise.

Can I take vitamin D while breastfeeding, too?

Yes — the same reference value applies during breastfeeding as during pregnancy: 20 micrograms, or 800 IU, a day if your own production isn't enough. Regardless of what you take, your breastfed baby will typically get their own low-dose vitamin D prescribed separately by your pediatrician.

Can diet alone cover my vitamin D needs during pregnancy?

No, everyday foods like oily fish or eggs can barely cover your needs on their own. Most of your vitamin D is produced in your skin through sunlight — if that's not enough, you either need more time outdoors or a supplement at the right dose. Fortified foods like some margarines only supply a small part of your overall intake.

Should I get my vitamin D level tested during pregnancy?

A blood test is the only reliable way to know whether your level is actually too low — and how much extra you might need. Bring it up at your next prenatal checkup if your OB-GYN or midwife doesn't mention it first.

From when in pregnancy should I pay attention to my vitamin D levels?

Ideally from the very start, since vitamin D plays a role in your calcium and bone metabolism throughout the entire pregnancy. An early check pairs well with one of your first prenatal appointments.