21st Century Vitamin D3 High Strength, 1000 IU, 500 Tablets - 2 Pack

Key Benefits of Vitamin D3

Vitamin D3 (cholecalciferol) contributes to several important functions in the body. It aids in the normal absorption and utilisation of calcium and phosphorus, which are essential for maintaining healthy bones and teeth. Adequate vitamin D levels also support normal muscle function and contribute to the normal function of the immune system. This supplement provides 1000 IU per tablet, a dose aligned with recommendations for daily maintenance. While individual needs vary, incorporating vitamin D3 into your routine can help maintain these vital processes, especially during months with limited sunlight.

Choosing the Right Dosage: 1000 IU

The UK government recommends 400 IU (10 µg) per day for most adults, but many experts suggest 1000–2000 IU for optimal blood levels during darker months. This supplement delivers 1000 IU of vitamin D3 per tablet, making it a convenient choice for daily maintenance. It is important not to exceed the tolerable upper intake level of 4000 IU per day without medical advice. As vitamin D is fat-soluble, taking tablets with a meal containing fat can enhance absorption. Always follow the label instructions and consult a health care professional before starting supplementation, especially if you have medical conditions or are taking other medications.

Who May Benefit from Vitamin D3?

Certain groups in the UK are at higher risk of low vitamin D levels. People with limited sun exposure—such as those who work indoors, live in northern areas, or cover their skin for cultural reasons—may need additional intake. Older adults, individuals with darker skin, and those who follow a vegan diet (whilst this D3 is typically derived from lanolin) should consider supplementation. Additionally, people with conditions affecting fat absorption (e.g., Crohn's, coeliac disease) or taking medications that interfere with vitamin D metabolism may benefit. A blood test can help determine your current vitamin D status and guide appropriate dosage.

What Makes This Vitamin D3 Supplement Special?

This supplement combines quality, value, and simplicity. Each tablet contains 1000 IU of bio-available vitamin D3 (cholecalciferol) without unnecessary additives. The 2-pack includes two bottles of 500 tablets each—enough for over a year with daily uses, reducing the need for frequent reorders. The tablets are gluten-free, free from artificial colours and preservatives, and manufactured in an FDA-inspected, GMP-compliant facility. While FDA is a US body, the facility adheres to international quality standards. This commitment to purity and potency ensures a reliable product that fits into a health-conscious lifestyle.

Quality You Can Trust

21st Century is dedicated to producing high-quality supplements. This vitamin D3 is manufactured in a facility that follows Good Manufacturing Practices (GMP) and undergoes rigorous testing for purity and potency. Each batch is checked to ensure consistent quality. The product is gluten-free and contains no artificial colours or preservatives. With the 2-pack, you get exceptional value—a year's supply at an affordable price. If you're looking for a dependable vitamin D3 supplement that meets high standards, this is an excellent choice.

These statements have not been evaluated by the Medicines and Health care products Regulatory Agency (MHRA) or the European Food Safety Authority. This product is not intended to diagnose, treat, , or prevent any disease.