Source Naturals Vitamin D3 50 mcg (2000 IU) - Bioactive Cholecalciferol for Bone and Immune Health - 100 Capsules

Vitamin D is essential for strong bones and a healthy immune system, but many of us in the UK don't produce enough from sunlight alone, particularly during autumn and winter. Source Naturals Vitamin D3 provides 50 mcg (2000 IU) of cholecalciferol—the same type your body generates naturally—to help maintain optimal levels and support your overall health.*

Vitamin D3 vs D2: What's the Difference?

Vitamin D comes in two primary forms: ergocalciferol (D2) from plant sources and cholecalciferol (D3) from animal sources and sunlight. While both can increase vitamin D levels, D3 is more efficient at sustaining long-term concentrations and is the form most health professionals recommend. Source Naturals use cholecalciferol (D3), identical to what your body produces, ensuring superior bioavailability and effectiveness.*

Key Benefits of Vitamin D for Your Health

Vitamin D is crucial for several bodily functions. Here are the main benefits supported by European research:

• Bone Health: Vitamin D contributes to normal absorption and utilisation of calcium and phosphorus, helping maintain strong, dense bones.*
• Immune Function: It supports the normal function of the immune system, helping your body defend against seasonal challenges.*
• Muscle Function: Vitamin D contributes to the maintenance of normal muscle function, which may help reduce the risk of falls in older adults.*
• Calcium Absorption: Without sufficient vitamin D, your body cannot absorb calcium efficiently, which can affect bone density over time.*

Who Should Consider Vitamin D Supplementation?

Certain groups are more likely to benefit from vitamin D supplements. If you have limited sun exposure, live in northern latitudes, spend most of your time indoors, or have darker skin, your natural vitamin D production may be inadequate. Older adults and people with digestive conditions that affect fat absorption may also require extra vitamin D. Many health experts now recommend year-round supplementation for optimal levels.

Recommended Dosage and Usage

Each capsule of Source Naturals Vitamin D3 delivers 50 mcg (2000 IU) of cholecalciferol—a common maintenance dose for adults. For best results, take one capsule daily with a meal containing fat, as vitamin D is fat-soluble. If you have specific health concerns or take other medications, consult your health care provider to determine the right dosage for you.

What Makes Source Naturals Vitamin D3 Special?

Source Naturals has been a trusted name in the supplement industry for over 40 years. Their Vitamin D3 is manufactured in the USA under strict Good Manufacturing Practises (cGMPs) to ensure quality and purity. Each batch is produced in Scotts Valley, California, and rigorously tested to meet high standards. This product use bioactive cholecalciferol, the form most efficiently utilised by the body.*

Safety and Side Effects

Vitamin D is generally safe when taken as directed. However, extremely high doses (typically above 10,000 IU per day for extended periods) can lead to toxicity, with symptoms like nausea, weakness, and kidney issues. The daily reference intake for most adults is 400–800 IU (10–20 mcg), but many experts consider 2000 IU (50 mcg) daily safe and effective for maintenance. If you are pregnant, nursing, or have a medical condition, consult your health care professional before use.

This product is a food supplement. It is not intended to diagnose, treat, or prevent any disease. Always read the label and follow directions for use.