Our Instant Dissolve MicroLingualâ"¢ Tablets go to work fast, bypassing the digestive system as they are quickly absorbed directly into the body under the tongue. Vitamin D works in conjunction with calcium to promote the development and maintenance of strong bones and teeth. Vitamin D is also essential in the modulation of neuromuscular and immune system function and in the reduction of inflammation. Our vitamin D products are D3, the finest source of vitamin D available.*