Key Benefits

• Supports the maintenance of normal bones and teeth.

• Helps your body absorb and use calcium and phosphorus.

• Contributes to the normal function of your immune system.

• Helps keep muscles working as they should.

Start your day strong with a high-strength serving of natural-source vitamin D3. Each drop of Premier Research Labs’ D3 Serum delivers 5,000 IU, making it simple to top up your daily intake.

Bone & Teeth Support: Vitamin D3 helps maintain normal bones and teeth, and supports your body’s ability to absorb calcium and phosphorus—essential for bone strength.

Immune & Muscle Function: Vitamin D3 contributes to the normal function of your immune system and helps keep your muscles working as they should.

Add D3 Serum to your routine for easy, everyday support—so you can stay active and feel your best, whatever the day brings.

Premier Research Labs reflects a steadfast dedication to purity, efficacy, and scientific integrity. Built on the vision of providing practitioner-grade nutritional supplements, the brand sources the finest raw materials from around the globe, favouring organic and natural ingredients. A team of in-house experts formulates each product with precision, using evidence-based research to unlock the power of botanicals. Every batch undergoes rigorous testing for contaminants and potency, ensuring unmatched quality. With vegan-friendly, solvent-free capsules and third-party certifications, Premier Research Labs offers supplements that health professionals trust—crafted with care, tested for excellence, and rooted in a mission to support global wellness.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

D-Alpha Tocopherol (Preservative), Extra Virgin Olive Oil, Vitamin D3 (5,000 IU)

Take 5 drops daily or as directed.

Additional Information:

Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.

If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.

We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.