You don't need to supplement diet pills , they are highly processed foods far from natural. Sometimes multivitamins seem to trigger my pouch , so I take them very irregularly now. Continuous supplementing pills can cause a diaroehha like situation for me too. The only few supps I take now are Vit C , zinc , creatine (preworkout) , BCAA ( sometimes post workout) , 1 scoop whey protein and fish oil caps.
For weight loss you can drink plain lemon water ( only lemon and salt) at night before you sleep and honey lemon water/ green tea in the morning . This is how I cut my fats during cutting and rest diet remains unchanged . It helps in detox too as a bonus.