Let's be clear - it's a question of EXTRA vitamins. Ruthless3D is a solid product but extra? No. First and foremost a healthy diet contains enough but we all, myself included, take a vitamin tablet (or two) daily. I'm using Ruthless right now. But that's MORE than enough. I don't then need to take even more during a PCT.
Ruthless, for example, contains 500mg of vitamin C. Whereas the optimal amount is 200mg. Why would I want to take even more when I'm already getting 250% more than I need as is?