Not surprised. "Bad/junk" western diet (i emphasize this here, as traditional western diet is extremely different and varied from one place to the other, and often times quite healthy actually - ref. traditional french, italian, spanish, meditterranean diets) + poor quality thai food (which what you overwhelmingly get nowdays -gone are the days of Thai high end traditional cooking...) , with crappy ingredients, terrible vegetable oils (soy bean, palm..), added sugar and glutamates of all kind + lack of exercise etc...etc....