Grounded Vitamin D3 4000 IU – 365 Tablets, High-Strength Daily Supplement

365 Days of Sunshine. In One Bottle.

For those of us living in the UK, Vitamin D deficiency is not a possibility — it's a near-certainty for much of the year. The sun simply doesn't rise high enough from October to March to trigger meaningful Vitamin D synthesis in the skin. Grounded's Vitamin D3 4000 IU tablets were formulated with this reality in mind: a high-strength, year-round daily supplement designed to keep your levels optimised so your body can do what it does best.

Each tablet delivers 4000 IU of Vitamin D3 (cholecalciferol) — the form of Vitamin D most readily used by the body, identical to what your skin produces in sunlight. With 365 tablets per bottle, this is a full year's supply in one simple, daily commitment. Vitamin D contributes to the normal function of the immune system, the maintenance of normal bones and teeth, normal muscle function, and the regulation of calcium absorption. These aren't minor benefits — they're foundational to how well you feel every day.

• 4000 IU Vitamin D3 (cholecalciferol) — the body's preferred form
• Supports normal immune system function year-round
• Contributes to the maintenance of normal bones and teeth
• Aids normal muscle function and reduces risk of fatigue
• 365 tablets — a complete annual supply in one bottle
• Easy once-daily tablet — no measuring, no mess
• By Grounded — science-led supplements for everyday wellness