21st Century D3-5000 IU High Potency Tablets - 110 Tablets, 2-Pack

What is Vitamin D and why is it important?

Discover 21St Century D3-5000 — Vitamin D, also known as the "sunshine vitamin," is an essential nutrient that the body produces when the skin is exposed to sunlight. However, in Spain, especially during the winter months, sun exposure is limited, making it difficult to reach optimal levels with sunlight alone. For this reason, vitamin D3 supplements become a key tool for maintaining optimal health.

Vitamin D plays a fundamental role in calcium absorption, making it a cornerstone for bone health. In addition, it contributes to the normal functioning of the immune system and helps maintain proper muscle function. 21st Century D3-5000 IU tablets offer a high dose of cholecalciferol (vitamin D3), the most bioavailable form and similar to what the human body produces, ideal for those who need an extra boost.

Health benefits of vitamin D

The European Food Safety Authority (EFSA) supports several benefits of vitamin D, always within a balanced diet and a healthy lifestyle. Below are the main recognized effects:

• Calcium and phosphorus absorption: Vitamin D contributes to the normal absorption and utilization of calcium and phosphorus, essential minerals for the formation and maintenance of bones and teeth.
• Maintenance of normal bones: Helps maintain bones in normal conditions, reducing the risk of age-related bone weakness.
• Muscle function: Contributes to the normal functioning of muscles, which promotes mobility and balance.
• Immune system: Vitamin D contributes to the normal functioning of the immune system, helping the body's defenses.
• Blood calcium levels: Contributes to the maintenance of normal blood calcium levels.

Each 21st Century D3-5000 IU tablet provides a dose of 5000 IU, an amount designed for adults with high needs or low vitamin D levels.

How much vitamin D do you need? Recommended dosage

Daily vitamin D requirements vary depending on age, sun exposure, and general health status. EFSA sets a reference intake of 2000 IU per day for adults, although many people may require higher doses if they are deficient. Supplements such as 21st Century D3-5000 IU offer a dose of 5000 IU per tablet, making it easy to reach recommended levels under professional supervision.

It is important not to exceed the tolerable upper limit (UL) established by EFSA at 4000 IU per day for adults, although higher doses may be indicated by a doctor in specific cases. Therefore, it is recommended to consult a healthcare professional before starting supplementation, especially with high doses.

This package contains 2 bottles with 110 tablets each, offering a total of 220 tablets. Taking one tablet a day, the package covers more than 7 months of supplementation.

Differences between vitamin D2 and D3

There are two main forms of vitamin D: D2 (ergocalciferol), of plant origin, and D3 (cholecalciferol), of animal origin. Vitamin D3 is the form that humans naturally produce after sun exposure, and various studies suggest that it is more effective at raising and maintaining blood vitamin D levels.

21st Century D3-5000 IU uses cholecalciferol (vitamin D3) obtained from lanolin (sheep wool fat), which ensures high purity and bioavailability. For people on vegan diets, there are alternatives of vitamin D3 of lichen origin, but this product is not certified as vegan.

How to choose the best vitamin D supplement

When selecting a vitamin D supplement, it is important to consider several factors:

• Form: Vitamin D3 (cholecalciferol) is the most recommended due to its greater absorption.
• Dosage: 5000 IU is a high dose, suitable for those with high needs or low levels. Always consult a professional.
• Presentation: Tablets are convenient and easy to take. This package includes two bottles, ideal for saving and ensuring a long-term supply.
• Quality and trust: 21st Century is a recognized brand in the food supplement sector, with products manufactured under strict quality controls.
• Value for money: With 220 tablets in total, the cost per dose is very competitive.

Remember that supplements should not replace a varied and balanced diet. Vitamin D is fat-soluble, so it is better absorbed if taken with a meal containing fats.

Possible side effects and contraindications

Vitamin D is generally safe when consumed at recommended doses. However, excessive and prolonged doses can cause hypercalcemia (elevated calcium levels in the blood), which can manifest as nausea, weakness, or kidney problems. The tolerable upper limit for adults is 4000 IU per day, according to EFSA.

This product is indicated for adults. Its use is not recommended in children, pregnant women, or breastfeeding women without medical supervision. It is always advisable to consult a healthcare professional before starting any supplementation, especially if you are taking other medications or suffer from any disease.

This product is a food supplement and should not be used as a substitute for a balanced diet.