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Vitamin D Testing
from Dried Blood Spot Samples

Offer convenient Vitamin D testing to your customers with remote sample collection and certified lab analysis.

Let’s Talk

What Is Vitamin D?

Vitamin D is a fat-soluble vitamin essential for bone health, immune defense, mood balance, and hormone regulation. It exists in two main forms — D2 (ergocalciferol) and D3 (cholecalciferol). In the body, both are converted to 25-hydroxyvitamin D [25(OH)D], which is the most reliable marker of Vitamin D status.

Bone Health

Regulates calcium and phosphorus absorption to support bone strength and prevent conditions like rickets and osteoporosis.
Immune Support

Plays a role in both innate and adaptive immunity, helping reduce infection risk and chronic inflammation.
Mood & Cognitive Function

Low Vitamin D levels are linked to increased risk of depression, anxiety, and cognitive decline.
Hormone Regulation

Vitamin D receptors are found in nearly all body tissues, influencing hormone activity and gene expression.

Why Is Vitamin D Testing Important?

  • Deficiency is common and often goes unnoticed without testing
  • Enables precise dosing of Vitamin D supplements
  • Confirms whether supplementation or lifestyle changes are working

For supplement and wellness brands, Vitamin D testing is a powerful tool to drive personalization, boost customer trust, and differentiate your product line.

What We Measure

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Analytes

Vitamin D2 and Vitamin D3, including epimeric forms

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Sample type

Dried blood spot (DBS)

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Method

Chromatography with spectrometry

Applications

  • Integrated Testing
    Offer testing alongside your Vitamin D products to help customers understand their needs and results.
  • Supplement Validation
    Measure the before-and-after effect of your Vitamin D products with biomarker data.
  • Client Retention
    Give your customers a reason to stay engaged with your brand — testing creates trust and measurable outcomes.

FAQ

Yes. DBS testing is minimally invasive and safe for pediatric use. We also measure epimers, which is especially important in infants to ensure accurate Vitamin D results.

We recommend testing your Vitamin D levels before starting supplementation and retesting after completing a course to assess effectiveness. Deficiency is common in low-sunlight regions and often goes unnoticed, so testing is useful even if you are not taking supplements.

Yes. Our test measures 25-hydroxyvitamin D [25(OH)D], which includes both D2 and D3 metabolites for a complete and reliable assessment of Vitamin D status.

The test uses a dried blood spot (DBS) sample collection kit. A small finger-prick is all that’s needed to collect a few drops of blood onto the DBS card, following our step-by-step instructions. The sample card is about the size of a business card and can be shipped at room temperature.

LifeLab1 is located at Dariaus ir Gireno str. 32A, LT-02188 Vilnius, Lithuania.
You can contact us by:
Email: info@lifelab1.com
Phone / WhatsApp: +370 646 95784
Our team can provide information about laboratory services, sample collection and submission requirements, testing and laboratory results.

The laboratory is open from 08:00 to 17:00 on business days and is closed on weekends.

Preparation and sample collection requirements may vary depending on the test.
Please follow the sample collection instructions provided with the collection kit. The dried blood spot sample must be collected, dried according to the instructions, packaged and submitted to the laboratory as specified in the instructions.
Following the provided instructions helps ensure that the sample is suitable for laboratory analysis.
If you have questions about sample collection or preparation requirements, please contact the laboratory before collecting the sample.

Samples are assessed upon receipt to determine whether they are suitable for laboratory testing.
A sample is accepted when it has been collected, dried, packaged, identified and submitted in accordance with the provided sample collection instructions and when there is sufficient suitable sample material to perform the requested analysis.
A sample may be rejected if, for example:
  • there is insufficient sample material for testing;
  • the sample was not collected or dried according to the provided instructions;
  • the sample is damaged, contaminated or otherwise unsuitable for reliable analysis;
  • packaging or transportation conditions have compromised the integrity of the sample.
If a sample does not meet the laboratory's acceptance criteria, the client or patient will be informed accordingly.

The expected turnaround time (TAT) for laboratory testing is within one week from the date the sample is received by the laboratory.
If the received sample does not meet the laboratory's acceptance criteria, the client or patient will be informed accordingly.

Yes.
Clients and patients may contact LifeLab1 for information regarding sample collection and preparation, sample submission requirements, laboratory testing and test results.
For laboratory-related questions, please contact us during working hours:
Email: info@lifelab1.com
Phone / WhatsApp: +370 646 95784

LifeLab1 processes personal data in accordance with the General Data Protection Regulation (EU) 2016/679 (GDPR) and applicable Lithuanian data protection legislation.
Information concerning a patient's health, laboratory test results and other personal health information is treated as confidential and is disclosed only where permitted by applicable legislation.
Detailed information about how personal data is collected, processed, stored and protected, as well as information about data subject rights, is available in the LifeLab1 Privacy Policy.

If a patient believes that their rights have been violated, the patient or their authorised representative has the right to submit a complaint to LifeLab1.
The complaint must be signed and include:
  • the patient's full name;
  • current residential address;
  • contact details;
  • a clear description of the issue or circumstances giving rise to the complaint.
If the complaint is submitted by an authorised representative, the representative's details and proof of authorisation must also be provided.
A complaint must be submitted no later than one year from the date on which the patient became aware of the violation of their rights and no later than three years from the actual date of the violation.
LifeLab1 reviews the complaint and provides the patient with a written response within 20 business days.
Full information on the complaint procedure is available in the UAB “Laboratorija 1” Internal Rules for Patients, Section 3.6 – Procedure for Resolving Disputes and Conflicts Between the Institution and Patients.

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