There is no such a pill.Every pill that works actually even those which works slowly have side effects and every pills that worked is banned cause it was steroids or it named steroids like clenbuterol or ephedrine.most countries have banned them too.even the only reason those thing to kill you was if you had a heart disease already.but still not safe.so those without sideffects they are not working almost at all,actualy they dont worth the money you will spend on them.in my opinion the only thing without sideffects and its definatly not banned is L Carnitine. which is kinda expensive too cause you have to use to for 3-6 months to see soe good results.anyway stick with the a nice healthy diet.low carbs and low calories and maybe every 2-3 weeks you can do a 4days straight full protein meals to drop some water out of your body