21st Century D 5000 UI Comprimidos, 360 unidades (Paquete de 2)

What makes this D3 vitamin supplement unique?

This food supplement combines vitamin D3 (cholecalciferol) in a dose of 5000 IU per tablet with calcium (90 mg of calcium carbonate) per serving. It comes in a convenient once-daily format, with 360 tablets per bottle and a 2-bottle pack, ideal for continuous use. Additionally, it is gluten-free and non-GMO, making it suitable for people with food sensitivities or those who prefer non-genetically modified ingredients.

Vitamin D3 is the most bioavailable form of vitamin D, similar to what the body produces after sun exposure. By being associated with calcium, this supplement offers a comprehensive approach to maintaining bone and muscle health, always within a balanced diet.

Benefits of vitamin D3 for health

Vitamin D is an essential nutrient with multiple functions in the body. Based on health claims approved by the European Food Safety Authority (EFSA), vitamin D contributes to:

• The normal absorption and utilization of calcium and phosphorus, key minerals for bone structure.
• The maintenance of normal bones, reducing the risk of age-related fragility.
• The normal functioning of muscles, promoting strength and coordination.
• The normal functioning of the immune system, supporting the body's natural defenses.
• The maintenance of normal blood calcium levels, essential for metabolic processes.

These effects occur when vitamin D reaches adequate levels in the body. In populations with limited sun exposure, especially during winter or in northern latitudes, supplementation can be a useful tool to meet daily needs.

How much vitamin D3 do you need per day?

Vitamin D needs vary by age, sun exposure, health status, and diet. The EFSA establishes an adequate intake of 15 µg (600 IU) per day for adults, and 20 µg (800 IU) for those over 70. However, many experts believe that higher doses may be necessary to correct deficiencies or maintain optimal levels in certain populations.

This supplement provides 5000 IU per tablet, a high dose that may be appropriate under professional supervision. The tolerable upper limit (UL) established by the EFSA is 100 µg (4000 IU) per day for adults, although higher doses can be used in clinical settings. Therefore, it is advisable to consult a healthcare professional before starting supplementation with high doses of vitamin D, especially if other supplements or medications are being taken.

Differences between vitamin D2 and D3

There are two main forms of vitamin D in supplements: ergocalciferol (D2) and cholecalciferol (D3). Vitamin D3 is the form that the human body naturally produces after exposure to sunlight. Numerous studies indicate that D3 is more effective in raising and maintaining blood levels of vitamin D compared to D2.

D2 is obtained from plant sources (yeasts exposed to UV light), while D3 usually comes from lanolin (sheep's wool fat) or, in vegan versions, from lichens. This product contains vitamin D3 (cholecalciferol), the form closest to what our body synthesizes, which favors its absorption and utilization.

How to choose the best vitamin D supplement

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

• Form of vitamin D: Prioritize D3 (cholecalciferol) due to its higher bioavailability.
• Dosage: Adapt the dose to individual needs and professional recommendations.
• Additional ingredients: The presence of calcium, as in this product, can be beneficial for bone health.
• Certifications: If following a gluten-free diet or preferring non-GMO products, verify the labeling. This product is suitable for both cases.
• Format and quantity: Tablets are a convenient option for daily use, and multiple packs offer good value for money in the long run.

This supplement brings together all these characteristics: it is high-dose vitamin D3, contains calcium, is gluten-free and non-GMO, and comes in an economical, long-lasting pack.

Possible side effects and contraindications

Vitamin D is generally safe at recommended doses. However, very high doses (>10,000 IU/day for prolonged periods) can lead to toxicity with symptoms such as hypercalcemia, nausea, or weakness. Since this product provides 5000 IU per tablet, the indicated dose (one tablet a day) should be respected and not exceeded without medical supervision.

People with hypercalcemia, sarcoidosis, kidney disorders, or kidney stones should consult their doctor before use. Additionally, if medications such as thiazide diuretics, digitalis, or antacids are being taken, it is necessary to evaluate possible interactions.

This product is a food supplement and should not be used as a substitute for a varied and balanced diet. Keep out of reach of children. Do not exceed the recommended daily dose.