Nutriburst Vitamin D3 + K2 Lemon 60 GummiesAbout this item EXPERIENCE BETTER BONE HEALTH & SKELETAL FUNCTION. Our Nutriburst Vitamin D3 & K2 gummies contain a simple balance of these two essential nutrients. Sunlight is the most common source of Vitamin 'D' but due to Britain's climate, it is difficult to maintain its levels throughout the year and it is essential for immune system function and cell division. Like D3, Vitamin K2 contributes to the maintenance of normal bones as it activates