What's this test for?

This test is ideal if you're concerned about your infant's Vitamin D levels, especially if your pediatrician has raised questions about bone development, growth, or nutrition. It's designed specifically for babies under 3 years old, whose blood chemistry can make standard Vitamin D tests inaccurate. If your little one was born prematurely, is exclusively breastfed, or has limited sun exposure, this test can give you a clear, accurate picture of their Vitamin D status.

What's included in this test?

This test measures your infant's true 25-hydroxyvitamin D level using a special lab method that separates out a substance called the c3-epimer, which can otherwise make Vitamin D levels look artificially high in young babies. Getting an accurate number matters because a falsely high result could mask a real deficiency, leading to missed treatment when your baby actually needs more Vitamin D for healthy bone and immune development.

What happens after I get my results?

Your infant's results will appear in your account with the normal range clearly explained so you can see exactly where their Vitamin D level falls. If levels are low, simple next steps like Vitamin D drops, more outdoor time, or dietary adjustments are usually recommended, along with a retest in a few months to check progress. A standard lab report is available to download directly from your account at any time. You can also track your child's Vitamin D levels over time using the trends feature as they grow.

How can I naturally support healthy Vitamin D levels in my infant?

Short, safe periods of sunlight exposure can help the body produce Vitamin D naturally, though this should be balanced carefully for infants. Vitamin D drops formulated for babies are commonly used, especially for breastfed infants, since breast milk alone often doesn't provide enough. Talk with your infant's pediatric care team about the right amount for your child's age and weight, and keep up with regular well-baby checkups to monitor growth alongside Vitamin D status.

When will I get my results?

Results are typically ready within about 7 days of your infant's sample being processed at the lab. You'll be notified as soon as the report is available in your account, so you can review it right away and decide on any next steps for your baby's care.

Who should consider this test?

This test is a good fit for parents of infants under 3 years old who want an accurate Vitamin D reading, particularly if their baby is breastfed, was born prematurely, has darker skin, or gets limited sun exposure. It's also useful if a previous Vitamin D test gave results that seemed inconsistent with your baby's diet or symptoms. Families with a history of Vitamin D deficiency or bone health concerns may also want to consider this test.

What symptoms indicate my infant may need this test?

Signs like delayed growth, soft or weak bones, irritability, or slow motor development can sometimes point to low Vitamin D in infants. Frequent illnesses or a diet lacking Vitamin D-fortified foods are also reasons to check levels. Since symptoms of deficiency can be subtle or easy to miss in babies, testing offers a more reliable way to know for sure.

What is Vitamin D and why does it matter for infants?

Vitamin D helps the body absorb calcium, which is essential for building strong bones and teeth during a baby's rapid growth period. It also plays a role in supporting a healthy immune system. Without enough Vitamin D, infants can be at higher risk for weak bones and a condition called rickets, so keeping levels in a healthy range is important during this critical growth stage.

What does a low Vitamin D result mean for my baby?

A low result means your infant may not be getting or absorbing enough Vitamin D, which can affect bone strength and growth if not addressed. This is usually managed with Vitamin D supplement drops, safe sun exposure, and dietary changes. Retesting after a few months of these changes helps confirm that levels are moving in the right direction.

How often should I retest my infant's Vitamin D levels?

If your baby's first result comes back low, retesting after about 2-3 months of supplementation or lifestyle changes is a reasonable timeframe to see if levels have improved. For infants with normal results, an annual check or retesting if new symptoms appear is generally sufficient. Tracking results over time in your account can help you and your family spot trends early.

Getting your blood test with us is easy, private & backed by the power of science.Long story short: In the test options, use the filters or search box to narrow your choices and find the test you want. If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test. Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout. If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want. When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system. Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way. You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy! If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

How do I know which test to get?

In the test options, find the test you want. If you’re not sure which test to get, we can lend a hand in finding the right option. Just text or call us at 754-799-7833, email us at support@privatemdlabs.com, and we'll gladly help you. We've got your back and reply quickly.

When will my lab results be available?

Most test results will be available within 1–3 business days. Once they're ready, we'll send an email and text message to let you know. After your blood draw, just hang tight and don't worry – we'll keep you updated and in the loop! If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com, and we'll gladly help you.

Is it possible to make changes to my lab order if I made a mistake with the name, date of birth, or any other details?

Absolutely! We totally understand that errors can happen. No worries, we're here to help you. Just reach out to us via text at 754-799-7833 or shoot us an email at support@privatemdlabs.com. Remember to include your order number and let us know the correct information you’d like to update. Our awesome team will jump right in and make sure everything is sorted out and accurate for you. There are no changes necessary if your address is wrong on the requisition though. We don’t mail anything out. Our lab requires an address to be listed to generate an order.

Do you accept health insurance?

Only HSA & FSA is accepted. Our services are strictly self-pay and cannot be submitted to your health insurance provider except for Health Savings Accounts or Flexible Savings Accounts. This policy applies to all insurance companies, including federal health insurance programs like Medicare. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com.

Can I cancel my order?

Yes. We get it – sometimes your needs change. As long as your samples haven’t been collected yet, we’re happy to help you cancel your order. If you have any further questions, please text us at 754-799-7833 or email support@privatemdlabs.com. You can read more about our cancellation policy here.

How can I find a lab location near me?

During the ordering process, you’ll be able to select a specific lab near you, with no strings attached! You can switch it up later easily and visit any of our authorized locations as long as it’s the same lab company you selected your test for (Quest Diagnostics or Labcorp). Before you proceed with your order, feel free to browse through all our lab locations here. This will give you the peace of mind of knowing that there's a lab nearby your home, office or your favorite gym. If you have any questions, please text us at 754-799-7833 or email support@privatemdlabs.com and we'll gladly help you.

Infant Vitamin D Test - Accurate Results Under Age 3

Getting your blood test with us is easy, private & backed by the power of science.

Long story short:

In the test options, use the filters or search box to narrow your choices and find the test you want.
If you need a hand navigating through options, text our super friendly support team at 754-799-7833, and we'll provide tailored suggestions to help you find the ideal test.
Once your order is placed, we’ll create your doctor’s lab order remotely, without any need for you to make a trip to a doctor in person or to talk to the doctor. Expect to receive your doctor’s lab order right in your inbox. It will also be in your patient portal if you need to find it later. We’ll also include instructions regarding fasting and other requirements for your test. Your patient portal will be auto-created hassle-free during checkout.
If this is your first time ordering, you'll be prompted to create a password for instant login access to your patient portal. It's a quick way to conveniently access your orders and results whenever you want.
When you’re ready, visit one of our 4,000 locations. Just bring your ID – no printing or faxing of your lab order is needed, as your order and details will already be in the lab system.
Note that most lab locations don’t accept walk-ins, so it’s best to book an appointment in advance. Don’t worry – we’ll provide detailed instructions along the way.
You’ll get your results via email & SMS and dive into understanding your body better. Yup, that easy!

754-799-7833

[email protected]

Infant Vitamin D Test (25-Hydroxyvitamin D)

QuestAssureD™ for Infants, 25-Hydroxyvitamin D

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

What's this test for?

What's included in this test?

What happens after I get my results?

Here’s why 1,000,000+ customers chose us for affordable hassle-free private blood testing.

Find a lab near you

Infant Vitamin D Test (25-Hydroxyvitamin D)

Prescription & all lab fees included

Doctor's guidance included

Fast & convenient

1,000,000+ blood tests later, here's what our customers say