Vitamina D3 400 UI, 100 Comprimidos

What is vitamin D and why is it important?

Vitamin D is an essential nutrient that plays a fundamental role in multiple bodily functions. Known as the "sunshine vitamin", our body produces it when the skin is exposed to sunlight. However, factors such as low sun exposure, sunscreen use, age, or living in northern latitudes can hinder adequate synthesis. Therefore, food supplements such as Major's vitamin D3 400 IU help to meet daily needs.

Vitamin D contributes to the normal absorption and utilization of calcium and phosphorus, making it an indispensable ally for bone health. In addition, it intervenes in the normal functioning of the immune system and muscles. This supplement provides cholecalciferol (vitamin D3), the most bioavailable form and similar to that produced by the human body.

Health benefits of vitamin D

According to the European Food Safety Authority (EFSA), vitamin D has several scientifically recognized benefits:

• Maintenance of bones in normal conditions: Vitamin D promotes the fixation of calcium in bones, helping to maintain their density and strength.
• Normal muscle function: Contributes to the correct functioning of muscles, which is essential for mobility and balance.
• Immune system: Helps maintain the body's defenses, participating in the modulation of the immune response.
• Absorption of calcium and phosphorus: Without vitamin D, ingested calcium is not absorbed efficiently, which can affect bone and dental health.

These effects make vitamin D especially relevant for older people, postmenopausal women, individuals with low sun exposure, and those following restrictive diets.

How much vitamin D do you need? Recommended dose

The amount of vitamin D each person needs varies depending on age, lifestyle, and sun exposure. As a reference, the recommended daily intake for adults in the European Union is 5 µg (200 IU) for the general population, although many health authorities suggest higher amounts, especially in winter. This Major supplement provides 400 IU (10 µg) per tablet, a moderate and adequate dose for daily maintenance.

It is recommended to take one tablet daily, preferably with a meal containing some fat to optimize its absorption. The recommended dose should not be exceeded without consulting a healthcare professional. In case of doubt, it is advisable to have a blood test to determine vitamin D levels and adjust supplementation personalized.

Differences between vitamin D2 and D3

There are two main forms of vitamin D in supplements: ergocalciferol (D2) and cholecalciferol (D3). Vitamin D2 is obtained from plant sources, such as mushrooms exposed to UV light, while D3 usually comes from lanolin (sheep's wool fat) or from lichens for vegan options. Several studies indicate that D3 is more effective at raising and maintaining blood levels of vitamin D, as it has a higher affinity for the body's receptors. Therefore, most experts prefer vitamin D3 as the form of choice in supplementation. The Major product contains cholecalciferol (D3), which ensures optimal bioavailability.

How to choose the best vitamin D supplement

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

• Form of vitamin D: Opt for D3 (cholecalciferol) for better absorption.
• Dosage: 400 IU is a standard maintenance dose; higher doses may be necessary under professional supervision.
• Purity and quality: Major is a recognized brand that follows strict quality controls.
• Format: Tablets are easy to take and dose.
• Additional supplements: Some formulas combine vitamin D with vitamin K2 to direct calcium to the bones, but this product is only vitamin D3.

This supplement is suitable for adults looking for a simple way to maintain adequate vitamin D levels, especially during months with less sunlight.

Possible side effects and contraindications

Vitamin D3 400 IU is generally well tolerated. At moderate doses, it usually does not cause adverse effects. However, excessively high doses (well above those recommended) can lead to hypercalcemia (high calcium levels in the blood), with symptoms such as nausea, weakness, or kidney problems. Therefore, the indicated dose should not be exceeded. This product is contraindicated in people with hypercalcemia or disorders affecting calcium metabolism. If you are pregnant, breastfeeding, or taking medication, consult your doctor before starting to take it.

This product is a food supplement and should not be used as a substitute for a balanced diet. A varied diet and a healthy lifestyle are the basis of well-being.