Genealogy / Why are some Polish people dark complected, and others very light [511]

I know white people with brown skin because of sun and food and the person I'm picturing is the father of one Polish friend i have , he has this yellow color on him as you described too and that's because his skin was so damage that it tries to get back to his original color but it can't also because of the diet he has (coke,junk food,etc)...... i also want to add that Polish people are mix of Slavs, Nordic, Mediterraneans and Tartars who are Asian type people or (primitive Mongol) pale skin, average height and obviously those kind of eyes.

well Slavic people aren't the one with blonde hair and blue eyes and hard features those are the NORDICS........... Slavs are the mix of the same Tartars, Nordic but originally the same as the Mediterraneans but they spread in 2 different directions back then and the ones that got into what is now Greece ,Italy ,France and Spain got that olive color because of sun and the food you eat in this areas like carots and olives, while the other ones that got into Russia,Belarus,Ukraine,... were in a different environment and had other sources of food.