What is D Lux 1000 Oral Vitamin D3 Spray? Vitamin D3 is manufactured by our bodies when our skin is exposed to UVB rays from the sun. Research clearly shows that only a small proportion of our essential vitamin D requirement is satisfied by our diet (around 10%) & modern lifestyles makes it harder to guarantee the recommended 2-3 hours of unprotected direct sunlight each week. What Does D Lux 1000 Oral Vitamin D3 Spray do? May benefit those with reduced exposure to sunlight or absorption, for example the elderly. May help to support healthy bones & teeth