Vitamin D3 Supplements — Buy Online in Spain

Vitamin D3 (cholecalciferol) is one of the most deficient nutrients in the Spanish population: more than 40% of adults have insufficient levels, even in a country as sunny as Spain. This fat-soluble vitamin is essential for bone health, the immune system, mood, and muscle function. Unlike vitamin D2, the D3 form is what the body naturally synthesizes with sun exposure and is absorbed more efficiently.

What is Vitamin D3 used for?

Vitamin D3 is involved in multiple bodily functions:

• Bone health: facilitates the absorption of calcium and phosphorus, essential minerals for maintaining strong bones and teeth.
• Immune system: strengthens the body's defenses, especially in autumn and winter.
• Mood: low vitamin D levels are associated with a higher risk of seasonal depression and chronic fatigue.
• Muscle function: contributes to the maintenance of muscle mass and reduces the risk of falls in older people.
• Cardiovascular health: studies associate optimal vitamin D levels with better heart health.

Who needs vitamin D3 supplementation?

• People over 50, with less skin synthesis
• People with little sun exposure or who work indoors
• Those who use sunscreen all year round
• Overweight people (vitamin D accumulates in fatty tissue)
• People with dark skin (less skin synthesis)
• Those who live in areas with little sunlight in winter

What dose of vitamin D3 do I need?

The usual maintenance dose is 1,000 to 2,000 IU per day. To correct an established deficiency, doses of 4,000 IU are used under supervision. Ideally, a vitamin D analysis (25-OH vitamin D) should be done before supplementing to know your exact level and adjust the dose.

Vitamin D3 + K2: the most recommended combination

Vitamin K2 acts synergistically with D3: it directs the absorbed calcium to the bones and prevents it from depositing in the arteries. For optimal utilization of vitamin D3, it is recommended to combine it with vitamin K2 (MK-7).

Our vitamin D3 brands

At AndaVida, you will find vitamin D3 supplements from the most recognized brands on the market: Solgar, Solaray, and Physalis. All with quality certifications and in different formats and concentrations to suit your needs.