Douglas Laboratories Vitamin D 1,000 IU (25 mcg) - 100 Tablets

Understanding Vitamin D3 and D2

Vitamin D exists in two primary forms: ergocalciferol (D2) from plant sources and cholecalciferol (D3) from animal sources and sunlight. Research suggests that D3 is more effective at raising and maintaining blood levels of 25-hydroxyvitamin D, the biomarker your doctor measures. Douglas Laboratories use cholecalciferol, the naturally occurring form your body recognises and utilises efficiently. This small difference matters: D3 binds more readily to vitamin D-binding proteins, resulting in better bioavailability. For those seeking reliable support without guesswork, D3 is the preferred choice.

Why Vitamin D3 Matters for Your Daily Health

Often referred to as the 'sunshine vitamin', vitamin D is essential for maintaining strong bones and a healthy immune system. Many people in the UK fall short, especially during autumn and winter due to limited sunlight. Douglas Laboratories Vitamin D 1,000 IU provides cholecalciferol, the same form your body synthesises from sunlight, in a convenient tablet to support your daily needs. Each serving delivers a moderate maintenance dose suitable for everyday use, helping to keep your natural defences and skeletal strength in top condition.

Key Benefits of Vitamin D Supplementation

• Bone Health: Vitamin D facilitates calcium and phosphorus absorption, helping maintain strong bones and teeth throughout life.*
• Immune Function: It modulates the activity of immune cells, supporting your body's natural defences against seasonal challenges.*
• Muscle Function: Adequate vitamin D levels contribute to normal muscle contraction and coordination, reducing the risk of falls in older adults.*
• Cell Growth: This vitamin influences cell proliferation and differentiation, supporting healthy tissue renewal.*

These structure-function claims are backed by decades of nutritional science. As with any supplement, consistent use alongside a balanced diet delivers the best outcomes.

Who Needs Vitamin D Supplementation?

Certain groups are more prone to low vitamin D levels. If you have limited sun exposure—whether due to climate, occupation, or lifestyle—your skin may not produce enough. Individuals with darker skin tones require longer sun exposure to synthesise D3. Older adults, people with digestive conditions, and those following vegan diets (whilst this product is not vegan) also face higher risk. Douglas Laboratories Vitamin D 1,000 IU offers a convenient baseline for maintaining adequate stores. For personalised dosing, consult a health care professional and consider a blood test.

Recommended Dosage of Vitamin D

In the UK, public health guidelines suggest 400 IU (10 mcg) daily for the general population, but many individuals require higher amounts. Douglas Laboratories provides 1,000 IU (25 mcg) per tablet, a moderate maintenance dose suitable for daily use. Since vitamin D is fat-soluble, take it with a meal containing healthy fats for optimal absorption. If you are pregnant, nursing, or taking medications like corticosteroids or anticonvulsants, talk to your doctor about your specific needs.

Choosing a Quality Vitamin D Supplement

Not all supplements are created equal. Look for third-party testing, transparent labelling, and clean ingredients. Douglas Laboratories manufactures in GMP-compliant facilities, ensuring purity and potency. This formula is non-GMO, free from wheat, gluten, soy and dairy, and contains no artificial colours or preservatives. Each tablet delivers exactly 1,000 IU of cholecalciferol, with no unnecessary binders or fillers. When you choose a supplement backed by science-based quality standards, you invest in predictable, reliable nutrition.

Safety and Side Effects

Vitamin D is safe when used as directed. However, excessive intake—typically above 4,000 IU daily from supplements—may lead to toxicity over time, causing hypercalcemia. Symptoms include nausea, weakness and kidney issues. Stick to the recommended serving and avoid stacking with other high-dose D supplements unless advised by a health care professional. If you have sarcoidosis, hyperparathyroidism or kidney disease, consult your doctor before use.

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