BioTechUSA Vitamin D3 is a vitamin d supplement that backs bone health and immune function, helping you stay active and resilient through the week. Its main active ingredient, vitamin d3, supports calcium absorption plus immune regulation, so daily life feels a bit easier overall. BioTechUSA's science-led approach and gluten-free, lactose-free formula underline quality you can trust.

Available Sizes & Variants:

120 tablets – four months supply, ideal for daily vitamin D3 supplementation.

Benefits & Features:

• Supports bone health with a vitamin d supplement.
• Supports immune function with a vitamin d3 supplement daily.
• Supports calcium absorption for better bone density and mineralisation overall.
• Strengthens muscle function and may help cut fall risk in older adults when taken consistently, because vitamin D3 acts on muscle and nerve pathways daily.
• Convenient everyday tablets help make this vitamin d3 supplement easy to slot into your busy routines.

BioTechUSA Vitamin D3 rests on a science-led ethos that mirrors the brand's commitment to purity and accessibility for everyone. The star ingredient, cholecalciferol, is the body's active form, and the tablets are gluten free and lactose free. The formulation uses microcrystalline cellulose as a bulking agent and a gentle coating to aid swallowing and reliable release. Research from Dr. Tripkovic of the University of Surrey shows vitamin D3 is more effective at raising and maintaining blood levels than vitamin D2 [which is widely recognised in studies].

Vitamin D, Vitamin D

• GTIN: 5999076239634
• Manufacturer: BioTechUSA
• Categories: Back to School Supplements & EssentialsBioTechUSA SupplementsSports SupplementsVitamin D
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

Take 1 tablet daily with a large glass of water. Store in a cool, dry place below 25°C and keep out of reach of children. Do not exceed the recommended daily dosage. Food supplements do not replace a balanced diet and healthy lifestyle.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Vitamin D3 (Cholecalciferol)

Vitamin D3, also known as cholecalciferol, is a fat-soluble nutrient that acts as a prohormone involved in mineral metabolism and immune regulation.

This form is the bioactive nutrient that supports calcium absorption and bone mineralisation, and is derived in this context as a high-potency source suitable for daily use.

What Does Vitamin D3 Do?

Vitamin D3 helps regulate calcium absorption and supports immune system function in line with recognised health guidance. It participates in maintaining normal mineral balance and contributes to normal bone health.

Dr. Holick of Harvard University found that Vitamin D3 is more effective at raising and maintaining serum levels than Vitamin D2, supporting its use for consistent vitamin D status.

This product is not intended to diagnose, treat, cure, or prevent any disease.

BioTechUSA shines for quality and accessibility in our vitamin D range lineup. BioTechUSA Vitamin D3 supplies a strong dose of the bioactive form of vitamin D3, packaged as gluten-free and lactose-free tablet, aligning with our promise of inclusive, easy-on-the-tummy supplements. Our clinical crew has reviewed this label to meet the certifications we ask for, and the product clearly shows the clean, transparent formulation we prioritise. That robust product profile is supported by our thorough internal process, where BioTechUSA was reviewed for consistency, safety and reliability in production.

The brand’s fit for this supplement is exact: a single potent D3 tablet that helps daily intake, without breaking dietary limits, with manufacturing that supports stable, predictable dosing. This brand was evaluated by our medical team for compliance with the certifications we require, and it matches the standard of quality we expect for Vitamin D3 products. This makes BioTechUSA the right partner for delivering dependable daily support through this supplement.