Vitamin D3  naturally occurring form that is produced in the presence of the sun’s ultraviolet-B (UVB) rays, hence its nickname, “the sunshine vitamin,”  D3 is produced in animals, including humans. Vitamin D production in the skin is the primary natural source of vitamin D, but many people have insufficient levels. Basically, In a tropical-like Bangladesh, do children have less chance of vitamin D deficiency?! Yes!!! Vitamin D status in various child groups in Bangladesh: up to 46.70% child has vitamin D deficiency; Up to 52.56% child had vitamin D insufficiency!! Only a few of them have vitamin D sufficiency!!! Stoss therapy with Libon Jr ™ proudly stands to fight such an emerging public health problem.