yes I have u can find it on my post history! took 300g in a random powder tub (had my mums spices and herbs in similar tubs too haha so it disguised) and 100g in a opened matcha packet in my backpack carryon. No issue! Edit: no issue in uk but i did go to pakistan where they dont even kno what kratom is and have zero regulations on it so pakistan was easy to take it to i would research turkey but if i was able to get out and back in with kratom to uk from HEATHROW then im sure u can get into