Why do marwari's jain's or north indian's face be shinning?

i am a north indian but i dont shine like my mom does that is because she was born and bought up in north india but i am not. the key to that skin is the diet. the toxic measure in the food grown there is comparatively low because the earth is naturally fertile. they drink full milk eat ample of fruits and vegetables henceforth they are healthy and strong from within which shows on the outside. a healthy diet in the long term will help. also as they do a lot of manual work the toxins get flushed out of their skin by sweat u cld exercise